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Finding the Fourth Proportional to 287,690.44, 431,520 and 88,010.82

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Solution

The fourth proportional to 287,690.44, 431,520 and 88,010.82 is: 132,011.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,690.44 : 431,520 = 88,010.82 : x
  2. Step 2: Convert to fraction form
    287,690.44/431,520 = 88,010.82/x
  3. Step 3: Cross multiply
    287,690.44x = 431,520 × 88,010.82
  4. Step 4: Simplify right side
    287,690.44x = 37,978,426,888.80
  5. Step 5: Solve for x
    x = 37,978,426,888.80/287,690.44
  6. Step 6: Final answer
    x = 132,011.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.