Home / 763,649.40-1,145,474.10-443,472.60

Finding the Fourth Proportional to 763,649.40, 1,145,474.10 and 443,472.60

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Solution

The fourth proportional to 763,649.40, 1,145,474.10 and 443,472.60 is: 665,208.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,649.40 : 1,145,474.10 = 443,472.60 : x
  2. Step 2: Convert to fraction form
    763,649.40/1,145,474.10 = 443,472.60/x
  3. Step 3: Cross multiply
    763,649.40x = 1,145,474.10 × 443,472.60
  4. Step 4: Simplify right side
    763,649.40x = 507,986,377,359.66
  5. Step 5: Solve for x
    x = 507,986,377,359.66/763,649.40
  6. Step 6: Final answer
    x = 665,208.90

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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.