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Finding the Fourth Proportional to 485,575.80, 727,586.10 and 307,764.60

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Solution

The fourth proportional to 485,575.80, 727,586.10 and 307,764.60 is: 461,154.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,575.80 : 727,586.10 = 307,764.60 : x
  2. Step 2: Convert to fraction form
    485,575.80/727,586.10 = 307,764.60/x
  3. Step 3: Cross multiply
    485,575.80x = 727,586.10 × 307,764.60
  4. Step 4: Simplify right side
    485,575.80x = 223,925,245,032.06
  5. Step 5: Solve for x
    x = 223,925,245,032.06/485,575.80
  6. Step 6: Final answer
    x = 461,154.05

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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.