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Finding the Fourth Proportional to 579,193.20, 868,789.80 and 478,809.90

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Solution

The fourth proportional to 579,193.20, 868,789.80 and 478,809.90 is: 718,214.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,193.20 : 868,789.80 = 478,809.90 : x
  2. Step 2: Convert to fraction form
    579,193.20/868,789.80 = 478,809.90/x
  3. Step 3: Cross multiply
    579,193.20x = 868,789.80 × 478,809.90
  4. Step 4: Simplify right side
    579,193.20x = 415,985,157,259.02
  5. Step 5: Solve for x
    x = 415,985,157,259.02/579,193.20
  6. Step 6: Final answer
    x = 718,214.85

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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.