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Finding the Fourth Proportional to 1,729.63, 2,387.11 and 1,031

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Solution

The fourth proportional to 1,729.63, 2,387.11 and 1,031 is: 1,422.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.63 : 2,387.11 = 1,031 : x
  2. Step 2: Convert to fraction form
    1,729.63/2,387.11 = 1,031/x
  3. Step 3: Cross multiply
    1,729.63x = 2,387.11 × 1,031
  4. Step 4: Simplify right side
    1,729.63x = 2,461,110.41
  5. Step 5: Solve for x
    x = 2,461,110.41/1,729.63
  6. Step 6: Final answer
    x = 1,422.91

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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.