Home / 1,731.90-2,390.40-1,142.49

Finding the Fourth Proportional to 1,731.90, 2,390.40 and 1,142.49

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Solution

The fourth proportional to 1,731.90, 2,390.40 and 1,142.49 is: 1,576.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,731.90 : 2,390.40 = 1,142.49 : x
  2. Step 2: Convert to fraction form
    1,731.90/2,390.40 = 1,142.49/x
  3. Step 3: Cross multiply
    1,731.90x = 2,390.40 × 1,142.49
  4. Step 4: Simplify right side
    1,731.90x = 2,731,008.10
  5. Step 5: Solve for x
    x = 2,731,008.10/1,731.90
  6. Step 6: Final answer
    x = 1,576.89

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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.