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Finding the Fourth Proportional to 478,424.60, 717,636.90 and 319,794.20

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Solution

The fourth proportional to 478,424.60, 717,636.90 and 319,794.20 is: 479,691.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,424.60 : 717,636.90 = 319,794.20 : x
  2. Step 2: Convert to fraction form
    478,424.60/717,636.90 = 319,794.20/x
  3. Step 3: Cross multiply
    478,424.60x = 717,636.90 × 319,794.20
  4. Step 4: Simplify right side
    478,424.60x = 229,496,118,325.98
  5. Step 5: Solve for x
    x = 229,496,118,325.98/478,424.60
  6. Step 6: Final answer
    x = 479,691.30

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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.