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Finding the Fourth Proportional to 390,925.65, 539,535.29 and 247,699.02

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Solution

The fourth proportional to 390,925.65, 539,535.29 and 247,699.02 is: 341,861.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,925.65 : 539,535.29 = 247,699.02 : x
  2. Step 2: Convert to fraction form
    390,925.65/539,535.29 = 247,699.02/x
  3. Step 3: Cross multiply
    390,925.65x = 539,535.29 × 247,699.02
  4. Step 4: Simplify right side
    390,925.65x = 133,642,361,349.92
  5. Step 5: Solve for x
    x = 133,642,361,349.92/390,925.65
  6. Step 6: Final answer
    x = 341,861.33

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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.