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Finding the Fourth Proportional to 287,432.63, 396,657.75 and 172,713.19

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Solution

The fourth proportional to 287,432.63, 396,657.75 and 172,713.19 is: 238,344.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,432.63 : 396,657.75 = 172,713.19 : x
  2. Step 2: Convert to fraction form
    287,432.63/396,657.75 = 172,713.19/x
  3. Step 3: Cross multiply
    287,432.63x = 396,657.75 × 172,713.19
  4. Step 4: Simplify right side
    287,432.63x = 68,508,025,340.72
  5. Step 5: Solve for x
    x = 68,508,025,340.72/287,432.63
  6. Step 6: Final answer
    x = 238,344.64

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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.