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Finding the Fourth Proportional to 318,882.48, 478,382.56 and 131,908.56

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Solution

The fourth proportional to 318,882.48, 478,382.56 and 131,908.56 is: 197,887.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,882.48 : 478,382.56 = 131,908.56 : x
  2. Step 2: Convert to fraction form
    318,882.48/478,382.56 = 131,908.56/x
  3. Step 3: Cross multiply
    318,882.48x = 478,382.56 × 131,908.56
  4. Step 4: Simplify right side
    318,882.48x = 63,102,754,618.71
  5. Step 5: Solve for x
    x = 63,102,754,618.71/318,882.48
  6. Step 6: Final answer
    x = 197,887.18

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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.