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Finding the Fourth Proportional to 641,072.40, 884,401.92 and 386,278.80

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Solution

The fourth proportional to 641,072.40, 884,401.92 and 386,278.80 is: 532,897.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,072.40 : 884,401.92 = 386,278.80 : x
  2. Step 2: Convert to fraction form
    641,072.40/884,401.92 = 386,278.80/x
  3. Step 3: Cross multiply
    641,072.40x = 884,401.92 × 386,278.80
  4. Step 4: Simplify right side
    641,072.40x = 341,625,712,375.30
  5. Step 5: Solve for x
    x = 341,625,712,375.30/641,072.40
  6. Step 6: Final answer
    x = 532,897.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.