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Finding the Fourth Proportional to 287,394.46, 396,635.53 and 158,346.18

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Solution

The fourth proportional to 287,394.46, 396,635.53 and 158,346.18 is: 218,534.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,394.46 : 396,635.53 = 158,346.18 : x
  2. Step 2: Convert to fraction form
    287,394.46/396,635.53 = 158,346.18/x
  3. Step 3: Cross multiply
    287,394.46x = 396,635.53 × 158,346.18
  4. Step 4: Simplify right side
    287,394.46x = 62,805,721,027.78
  5. Step 5: Solve for x
    x = 62,805,721,027.78/287,394.46
  6. Step 6: Final answer
    x = 218,534.91

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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.