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Finding the Fourth Proportional to 478,431.60, 717,647.40 and 329,132.40

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Solution

The fourth proportional to 478,431.60, 717,647.40 and 329,132.40 is: 493,698.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,431.60 : 717,647.40 = 329,132.40 : x
  2. Step 2: Convert to fraction form
    478,431.60/717,647.40 = 329,132.40/x
  3. Step 3: Cross multiply
    478,431.60x = 717,647.40 × 329,132.40
  4. Step 4: Simplify right side
    478,431.60x = 236,201,011,115.76
  5. Step 5: Solve for x
    x = 236,201,011,115.76/478,431.60
  6. Step 6: Final answer
    x = 493,698.60

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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.