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Finding the Fourth Proportional to 478,725.80, 718,088.70 and 329,426.60

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Solution

The fourth proportional to 478,725.80, 718,088.70 and 329,426.60 is: 494,139.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,725.80 : 718,088.70 = 329,426.60 : x
  2. Step 2: Convert to fraction form
    478,725.80/718,088.70 = 329,426.60/x
  3. Step 3: Cross multiply
    478,725.80x = 718,088.70 × 329,426.60
  4. Step 4: Simplify right side
    478,725.80x = 236,557,518,939.42
  5. Step 5: Solve for x
    x = 236,557,518,939.42/478,725.80
  6. Step 6: Final answer
    x = 494,139.90

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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.