Home / 763,430.80-1,145,146.20-728,438.80

Finding the Fourth Proportional to 763,430.80, 1,145,146.20 and 728,438.80

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Solution

The fourth proportional to 763,430.80, 1,145,146.20 and 728,438.80 is: 1,092,658.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,430.80 : 1,145,146.20 = 728,438.80 : x
  2. Step 2: Convert to fraction form
    763,430.80/1,145,146.20 = 728,438.80/x
  3. Step 3: Cross multiply
    763,430.80x = 1,145,146.20 × 728,438.80
  4. Step 4: Simplify right side
    763,430.80x = 834,168,923,752.56
  5. Step 5: Solve for x
    x = 834,168,923,752.56/763,430.80
  6. Step 6: Final answer
    x = 1,092,658.20

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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.