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Finding the Fourth Proportional to 807,789,347.70, 1,211,684,021.55 and 807,789,347.70

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Solution

The fourth proportional to 807,789,347.70, 1,211,684,021.55 and 807,789,347.70 is: 1,211,684,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,789,347.70 : 1,211,684,021.55 = 807,789,347.70 : x
  2. Step 2: Convert to fraction form
    807,789,347.70/1,211,684,021.55 = 807,789,347.70/x
  3. Step 3: Cross multiply
    807,789,347.70x = 1,211,684,021.55 × 807,789,347.70
  4. Step 4: Simplify right side
    807,789,347.70x = 978,785,445,386,387,200
  5. Step 5: Solve for x
    x = 978,785,445,386,387,200/807,789,347.70
  6. Step 6: Final answer
    x = 1,211,684,021.55

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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.