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Finding the Fourth Proportional to 713,931.36, 985,232.88 and 391,642.08

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Solution

The fourth proportional to 713,931.36, 985,232.88 and 391,642.08 is: 540,470.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,931.36 : 985,232.88 = 391,642.08 : x
  2. Step 2: Convert to fraction form
    713,931.36/985,232.88 = 391,642.08/x
  3. Step 3: Cross multiply
    713,931.36x = 985,232.88 × 391,642.08
  4. Step 4: Simplify right side
    713,931.36x = 385,858,654,407.59
  5. Step 5: Solve for x
    x = 385,858,654,407.59/713,931.36
  6. Step 6: Final answer
    x = 540,470.24

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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.