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Finding the Fourth Proportional to 318,640.92, 439,724.39 and 175,400.25

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Solution

The fourth proportional to 318,640.92, 439,724.39 and 175,400.25 is: 242,052.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,640.92 : 439,724.39 = 175,400.25 : x
  2. Step 2: Convert to fraction form
    318,640.92/439,724.39 = 175,400.25/x
  3. Step 3: Cross multiply
    318,640.92x = 439,724.39 × 175,400.25
  4. Step 4: Simplify right side
    318,640.92x = 77,127,767,060.10
  5. Step 5: Solve for x
    x = 77,127,767,060.10/318,640.92
  6. Step 6: Final answer
    x = 242,052.30

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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.