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Finding the Fourth Proportional to 393,294.15, 542,787.54 and 240,421.80

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Solution

The fourth proportional to 393,294.15, 542,787.54 and 240,421.80 is: 331,807.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,294.15 : 542,787.54 = 240,421.80 : x
  2. Step 2: Convert to fraction form
    393,294.15/542,787.54 = 240,421.80/x
  3. Step 3: Cross multiply
    393,294.15x = 542,787.54 × 240,421.80
  4. Step 4: Simplify right side
    393,294.15x = 130,497,957,384.37
  5. Step 5: Solve for x
    x = 130,497,957,384.37/393,294.15
  6. Step 6: Final answer
    x = 331,807.52

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1.5x scale

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.