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Finding the Fourth Proportional to 485,444.60, 728,166.90 and 326,814.20

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Solution

The fourth proportional to 485,444.60, 728,166.90 and 326,814.20 is: 490,221.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,444.60 : 728,166.90 = 326,814.20 : x
  2. Step 2: Convert to fraction form
    485,444.60/728,166.90 = 326,814.20/x
  3. Step 3: Cross multiply
    485,444.60x = 728,166.90 × 326,814.20
  4. Step 4: Simplify right side
    485,444.60x = 237,975,282,889.98
  5. Step 5: Solve for x
    x = 237,975,282,889.98/485,444.60
  6. Step 6: Final answer
    x = 490,221.30

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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.