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Finding the Fourth Proportional to 485,998.80, 728,998.20 and 447,507.60

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Solution

The fourth proportional to 485,998.80, 728,998.20 and 447,507.60 is: 671,261.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,998.80 : 728,998.20 = 447,507.60 : x
  2. Step 2: Convert to fraction form
    485,998.80/728,998.20 = 447,507.60/x
  3. Step 3: Cross multiply
    485,998.80x = 728,998.20 × 447,507.60
  4. Step 4: Simplify right side
    485,998.80x = 326,232,234,886.32
  5. Step 5: Solve for x
    x = 326,232,234,886.32/485,998.80
  6. Step 6: Final answer
    x = 671,261.40

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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.