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Finding the Fourth Proportional to 553,646.13, 763,812.95 and 349,620.90

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Solution

The fourth proportional to 553,646.13, 763,812.95 and 349,620.90 is: 482,338.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,646.13 : 763,812.95 = 349,620.90 : x
  2. Step 2: Convert to fraction form
    553,646.13/763,812.95 = 349,620.90/x
  3. Step 3: Cross multiply
    553,646.13x = 763,812.95 × 349,620.90
  4. Step 4: Simplify right side
    553,646.13x = 267,044,971,010.66
  5. Step 5: Solve for x
    x = 267,044,971,010.66/553,646.13
  6. Step 6: Final answer
    x = 482,338.73

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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.