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Finding the Fourth Proportional to 542,811.70, 814,217.55 and 487,699.30

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Solution

The fourth proportional to 542,811.70, 814,217.55 and 487,699.30 is: 731,548.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,811.70 : 814,217.55 = 487,699.30 : x
  2. Step 2: Convert to fraction form
    542,811.70/814,217.55 = 487,699.30/x
  3. Step 3: Cross multiply
    542,811.70x = 814,217.55 × 487,699.30
  4. Step 4: Simplify right side
    542,811.70x = 397,093,329,182.72
  5. Step 5: Solve for x
    x = 397,093,329,182.72/542,811.70
  6. Step 6: Final answer
    x = 731,548.95

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Half scale
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Double scale
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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.