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Finding the Fourth Proportional to 391,110.64, 539,736.86 and 240,207.64

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Solution

The fourth proportional to 391,110.64, 539,736.86 and 240,207.64 is: 331,489.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,110.64 : 539,736.86 = 240,207.64 : x
  2. Step 2: Convert to fraction form
    391,110.64/539,736.86 = 240,207.64/x
  3. Step 3: Cross multiply
    391,110.64x = 539,736.86 × 240,207.64
  4. Step 4: Simplify right side
    391,110.64x = 129,648,917,361.61
  5. Step 5: Solve for x
    x = 129,648,917,361.61/391,110.64
  6. Step 6: Final answer
    x = 331,489.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.