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Finding the Fourth Proportional to 387,990.72, 535,473.80 and 235,024.43

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Solution

The fourth proportional to 387,990.72, 535,473.80 and 235,024.43 is: 324,361.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,990.72 : 535,473.80 = 235,024.43 : x
  2. Step 2: Convert to fraction form
    387,990.72/535,473.80 = 235,024.43/x
  3. Step 3: Cross multiply
    387,990.72x = 535,473.80 × 235,024.43
  4. Step 4: Simplify right side
    387,990.72x = 125,849,420,772.44
  5. Step 5: Solve for x
    x = 125,849,420,772.44/387,990.72
  6. Step 6: Final answer
    x = 324,361.94

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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.