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Finding the Fourth Proportional to 393,417.66, 589,129.98 and 243,949.86

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Solution

The fourth proportional to 393,417.66, 589,129.98 and 243,949.86 is: 365,306.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,417.66 : 589,129.98 = 243,949.86 : x
  2. Step 2: Convert to fraction form
    393,417.66/589,129.98 = 243,949.86/x
  3. Step 3: Cross multiply
    393,417.66x = 589,129.98 × 243,949.86
  4. Step 4: Simplify right side
    393,417.66x = 143,718,176,142.80
  5. Step 5: Solve for x
    x = 143,718,176,142.80/393,417.66
  6. Step 6: Final answer
    x = 365,306.88

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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.