Home / 763,428.80-1,145,143.20-728,436.80

Finding the Fourth Proportional to 763,428.80, 1,145,143.20 and 728,436.80

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Solution

The fourth proportional to 763,428.80, 1,145,143.20 and 728,436.80 is: 1,092,655.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,428.80 : 1,145,143.20 = 728,436.80 : x
  2. Step 2: Convert to fraction form
    763,428.80/1,145,143.20 = 728,436.80/x
  3. Step 3: Cross multiply
    763,428.80x = 1,145,143.20 × 728,436.80
  4. Step 4: Simplify right side
    763,428.80x = 834,164,448,149.76
  5. Step 5: Solve for x
    x = 834,164,448,149.76/763,428.80
  6. Step 6: Final answer
    x = 1,092,655.20

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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.