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Finding the Fourth Proportional to 478,442.20, 717,663.30 and 455,114.20

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Solution

The fourth proportional to 478,442.20, 717,663.30 and 455,114.20 is: 682,671.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,442.20 : 717,663.30 = 455,114.20 : x
  2. Step 2: Convert to fraction form
    478,442.20/717,663.30 = 455,114.20/x
  3. Step 3: Cross multiply
    478,442.20x = 717,663.30 × 455,114.20
  4. Step 4: Simplify right side
    478,442.20x = 326,618,758,648.86
  5. Step 5: Solve for x
    x = 326,618,758,648.86/478,442.20
  6. Step 6: Final answer
    x = 682,671.30

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Similar ratio
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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.