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Finding the Fourth Proportional to 391,285.85, 542,737.04 and 380,915.37

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Solution

The fourth proportional to 391,285.85, 542,737.04 and 380,915.37 is: 528,352.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,285.85 : 542,737.04 = 380,915.37 : x
  2. Step 2: Convert to fraction form
    391,285.85/542,737.04 = 380,915.37/x
  3. Step 3: Cross multiply
    391,285.85x = 542,737.04 × 380,915.37
  4. Step 4: Simplify right side
    391,285.85x = 206,736,878,499.73
  5. Step 5: Solve for x
    x = 206,736,878,499.73/391,285.85
  6. Step 6: Final answer
    x = 528,352.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.