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Finding the Fourth Proportional to 800,814,643.70, 1,201,221,965.55 and 628,821,965.30

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Solution

The fourth proportional to 800,814,643.70, 1,201,221,965.55 and 628,821,965.30 is: 943,232,947.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,814,643.70 : 1,201,221,965.55 = 628,821,965.30 : x
  2. Step 2: Convert to fraction form
    800,814,643.70/1,201,221,965.55 = 628,821,965.30/x
  3. Step 3: Cross multiply
    800,814,643.70x = 1,201,221,965.55 × 628,821,965.30
  4. Step 4: Simplify right side
    800,814,643.70x = 755,354,757,138,679,808
  5. Step 5: Solve for x
    x = 755,354,757,138,679,808/800,814,643.70
  6. Step 6: Final answer
    x = 943,232,947.95

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.