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Finding the Fourth Proportional to 287,488.22, 396,734.27 and 172,768.61

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Solution

The fourth proportional to 287,488.22, 396,734.27 and 172,768.61 is: 238,421.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,488.22 : 396,734.27 = 172,768.61 : x
  2. Step 2: Convert to fraction form
    287,488.22/396,734.27 = 172,768.61/x
  3. Step 3: Cross multiply
    287,488.22x = 396,734.27 × 172,768.61
  4. Step 4: Simplify right side
    287,488.22x = 68,543,228,495.26
  5. Step 5: Solve for x
    x = 68,543,228,495.26/287,488.22
  6. Step 6: Final answer
    x = 238,421.00

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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.