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Finding the Fourth Proportional to 606,139.60, 908,626.20 and 471,128.80

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Solution

The fourth proportional to 606,139.60, 908,626.20 and 471,128.80 is: 706,239.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,139.60 : 908,626.20 = 471,128.80 : x
  2. Step 2: Convert to fraction form
    606,139.60/908,626.20 = 471,128.80/x
  3. Step 3: Cross multiply
    606,139.60x = 908,626.20 × 471,128.80
  4. Step 4: Simplify right side
    606,139.60x = 428,079,971,254.56
  5. Step 5: Solve for x
    x = 428,079,971,254.56/606,139.60
  6. Step 6: Final answer
    x = 706,239.90

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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.