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Finding the Fourth Proportional to 393,390.40, 542,927.52 and 240,397.12

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Solution

The fourth proportional to 393,390.40, 542,927.52 and 240,397.12 is: 331,777.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,390.40 : 542,927.52 = 240,397.12 : x
  2. Step 2: Convert to fraction form
    393,390.40/542,927.52 = 240,397.12/x
  3. Step 3: Cross multiply
    393,390.40x = 542,927.52 × 240,397.12
  4. Step 4: Simplify right side
    393,390.40x = 130,518,212,176.74
  5. Step 5: Solve for x
    x = 130,518,212,176.74/393,390.40
  6. Step 6: Final answer
    x = 331,777.83

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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.