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Finding the Fourth Proportional to 459,010.80, 688,516.20 and 426,205.80

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Solution

The fourth proportional to 459,010.80, 688,516.20 and 426,205.80 is: 639,308.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,010.80 : 688,516.20 = 426,205.80 : x
  2. Step 2: Convert to fraction form
    459,010.80/688,516.20 = 426,205.80/x
  3. Step 3: Cross multiply
    459,010.80x = 688,516.20 × 426,205.80
  4. Step 4: Simplify right side
    459,010.80x = 293,449,597,833.96
  5. Step 5: Solve for x
    x = 293,449,597,833.96/459,010.80
  6. Step 6: Final answer
    x = 639,308.70

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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.