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Finding the Fourth Proportional to 547,773.70, 821,660.55 and 387,415.30

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Solution

The fourth proportional to 547,773.70, 821,660.55 and 387,415.30 is: 581,122.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,773.70 : 821,660.55 = 387,415.30 : x
  2. Step 2: Convert to fraction form
    547,773.70/821,660.55 = 387,415.30/x
  3. Step 3: Cross multiply
    547,773.70x = 821,660.55 × 387,415.30
  4. Step 4: Simplify right side
    547,773.70x = 318,323,868,476.42
  5. Step 5: Solve for x
    x = 318,323,868,476.42/547,773.70
  6. Step 6: Final answer
    x = 581,122.95

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.