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Finding the Fourth Proportional to 431,649.80, 647,474.70 and 404,001.80

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Solution

The fourth proportional to 431,649.80, 647,474.70 and 404,001.80 is: 606,002.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,649.80 : 647,474.70 = 404,001.80 : x
  2. Step 2: Convert to fraction form
    431,649.80/647,474.70 = 404,001.80/x
  3. Step 3: Cross multiply
    431,649.80x = 647,474.70 × 404,001.80
  4. Step 4: Simplify right side
    431,649.80x = 261,580,944,254.46
  5. Step 5: Solve for x
    x = 261,580,944,254.46/431,649.80
  6. Step 6: Final answer
    x = 606,002.70

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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.