Home / 460,856.80-691,285.20-128,432.80

Finding the Fourth Proportional to 460,856.80, 691,285.20 and 128,432.80

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Solution

The fourth proportional to 460,856.80, 691,285.20 and 128,432.80 is: 192,649.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    460,856.80 : 691,285.20 = 128,432.80 : x
  2. Step 2: Convert to fraction form
    460,856.80/691,285.20 = 128,432.80/x
  3. Step 3: Cross multiply
    460,856.80x = 691,285.20 × 128,432.80
  4. Step 4: Simplify right side
    460,856.80x = 88,783,693,834.56
  5. Step 5: Solve for x
    x = 88,783,693,834.56/460,856.80
  6. Step 6: Final answer
    x = 192,649.20

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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.