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Finding the Fourth Proportional to 664,643.90, 996,965.85 and 243,865.10

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Solution

The fourth proportional to 664,643.90, 996,965.85 and 243,865.10 is: 365,797.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,643.90 : 996,965.85 = 243,865.10 : x
  2. Step 2: Convert to fraction form
    664,643.90/996,965.85 = 243,865.10/x
  3. Step 3: Cross multiply
    664,643.90x = 996,965.85 × 243,865.10
  4. Step 4: Simplify right side
    664,643.90x = 243,125,176,706.84
  5. Step 5: Solve for x
    x = 243,125,176,706.84/664,643.90
  6. Step 6: Final answer
    x = 365,797.65

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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.