Home / 858,609.60-1,288,060.20-459,141.90

Finding the Fourth Proportional to 858,609.60, 1,288,060.20 and 459,141.90

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Solution

The fourth proportional to 858,609.60, 1,288,060.20 and 459,141.90 is: 688,790.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,609.60 : 1,288,060.20 = 459,141.90 : x
  2. Step 2: Convert to fraction form
    858,609.60/1,288,060.20 = 459,141.90/x
  3. Step 3: Cross multiply
    858,609.60x = 1,288,060.20 × 459,141.90
  4. Step 4: Simplify right side
    858,609.60x = 591,402,407,542.38
  5. Step 5: Solve for x
    x = 591,402,407,542.38/858,609.60
  6. Step 6: Final answer
    x = 688,790.82

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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.