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Finding the Fourth Proportional to 393,553.60, 542,949.60 and 242,388.16

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Solution

The fourth proportional to 393,553.60, 542,949.60 and 242,388.16 is: 334,400.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,553.60 : 542,949.60 = 242,388.16 : x
  2. Step 2: Convert to fraction form
    393,553.60/542,949.60 = 242,388.16/x
  3. Step 3: Cross multiply
    393,553.60x = 542,949.60 × 242,388.16
  4. Step 4: Simplify right side
    393,553.60x = 131,604,554,516.74
  5. Step 5: Solve for x
    x = 131,604,554,516.74/393,553.60
  6. Step 6: Final answer
    x = 334,400.59

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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.