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Finding the Fourth Proportional to 478,686.80, 718,030.20 and 329,387.60

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Solution

The fourth proportional to 478,686.80, 718,030.20 and 329,387.60 is: 494,081.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,686.80 : 718,030.20 = 329,387.60 : x
  2. Step 2: Convert to fraction form
    478,686.80/718,030.20 = 329,387.60/x
  3. Step 3: Cross multiply
    478,686.80x = 718,030.20 × 329,387.60
  4. Step 4: Simplify right side
    478,686.80x = 236,510,244,305.52
  5. Step 5: Solve for x
    x = 236,510,244,305.52/478,686.80
  6. Step 6: Final answer
    x = 494,081.40

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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.