Home / 742,500.80-1,113,751.20-443,319.20

Finding the Fourth Proportional to 742,500.80, 1,113,751.20 and 443,319.20

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Solution

The fourth proportional to 742,500.80, 1,113,751.20 and 443,319.20 is: 664,978.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,500.80 : 1,113,751.20 = 443,319.20 : x
  2. Step 2: Convert to fraction form
    742,500.80/1,113,751.20 = 443,319.20/x
  3. Step 3: Cross multiply
    742,500.80x = 1,113,751.20 × 443,319.20
  4. Step 4: Simplify right side
    742,500.80x = 493,747,290,983.04
  5. Step 5: Solve for x
    x = 493,747,290,983.04/742,500.80
  6. Step 6: Final answer
    x = 664,978.80

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Double scale
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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.