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Finding the Fourth Proportional to 615,721.98, 849,748.86 and 343,842.40

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Solution

The fourth proportional to 615,721.98, 849,748.86 and 343,842.40 is: 474,531.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,721.98 : 849,748.86 = 343,842.40 : x
  2. Step 2: Convert to fraction form
    615,721.98/849,748.86 = 343,842.40/x
  3. Step 3: Cross multiply
    615,721.98x = 849,748.86 × 343,842.40
  4. Step 4: Simplify right side
    615,721.98x = 292,179,687,419.66
  5. Step 5: Solve for x
    x = 292,179,687,419.66/615,721.98
  6. Step 6: Final answer
    x = 474,531.85

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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.