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Finding the Fourth Proportional to 462,988.20, 638,920.26 and 261,791.40

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Solution

The fourth proportional to 462,988.20, 638,920.26 and 261,791.40 is: 361,270.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    462,988.20 : 638,920.26 = 261,791.40 : x
  2. Step 2: Convert to fraction form
    462,988.20/638,920.26 = 261,791.40/x
  3. Step 3: Cross multiply
    462,988.20x = 638,920.26 × 261,791.40
  4. Step 4: Simplify right side
    462,988.20x = 167,263,829,353.76
  5. Step 5: Solve for x
    x = 167,263,829,353.76/462,988.20
  6. Step 6: Final answer
    x = 361,270.18

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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.