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Finding the Fourth Proportional to 393,219.52, 542,701.19 and 240,345.79

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Solution

The fourth proportional to 393,219.52, 542,701.19 and 240,345.79 is: 331,712.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,219.52 : 542,701.19 = 240,345.79 : x
  2. Step 2: Convert to fraction form
    393,219.52/542,701.19 = 240,345.79/x
  3. Step 3: Cross multiply
    393,219.52x = 542,701.19 × 240,345.79
  4. Step 4: Simplify right side
    393,219.52x = 130,435,945,488.60
  5. Step 5: Solve for x
    x = 130,435,945,488.60/393,219.52
  6. Step 6: Final answer
    x = 331,712.80

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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.