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Finding the Fourth Proportional to 459,489.80, 689,234.67 and 143,946.70

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Solution

The fourth proportional to 459,489.80, 689,234.67 and 143,946.70 is: 215,920.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,489.80 : 689,234.67 = 143,946.70 : x
  2. Step 2: Convert to fraction form
    459,489.80/689,234.67 = 143,946.70/x
  3. Step 3: Cross multiply
    459,489.80x = 689,234.67 × 143,946.70
  4. Step 4: Simplify right side
    459,489.80x = 99,213,056,272.09
  5. Step 5: Solve for x
    x = 99,213,056,272.09/459,489.80
  6. Step 6: Final answer
    x = 215,920.04

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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.