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Finding the Fourth Proportional to 1,721.34, 2,577.90 and 940.17

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Solution

The fourth proportional to 1,721.34, 2,577.90 and 940.17 is: 1,408.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.34 : 2,577.90 = 940.17 : x
  2. Step 2: Convert to fraction form
    1,721.34/2,577.90 = 940.17/x
  3. Step 3: Cross multiply
    1,721.34x = 2,577.90 × 940.17
  4. Step 4: Simplify right side
    1,721.34x = 2,423,668.64
  5. Step 5: Solve for x
    x = 2,423,668.64/1,721.34
  6. Step 6: Final answer
    x = 1,408.01

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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.