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Finding the Fourth Proportional to 392,876.61, 542,155.30 and 240,170.55

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Solution

The fourth proportional to 392,876.61, 542,155.30 and 240,170.55 is: 331,426.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,876.61 : 542,155.30 = 240,170.55 : x
  2. Step 2: Convert to fraction form
    392,876.61/542,155.30 = 240,170.55/x
  3. Step 3: Cross multiply
    392,876.61x = 542,155.30 × 240,170.55
  4. Step 4: Simplify right side
    392,876.61x = 130,209,736,586.42
  5. Step 5: Solve for x
    x = 130,209,736,586.42/392,876.61
  6. Step 6: Final answer
    x = 331,426.54

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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.