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Finding the Fourth Proportional to 1,707.76, 2,560.23 and 667.21

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Solution

The fourth proportional to 1,707.76, 2,560.23 and 667.21 is: 1,000.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,707.76 : 2,560.23 = 667.21 : x
  2. Step 2: Convert to fraction form
    1,707.76/2,560.23 = 667.21/x
  3. Step 3: Cross multiply
    1,707.76x = 2,560.23 × 667.21
  4. Step 4: Simplify right side
    1,707.76x = 1,708,211.06
  5. Step 5: Solve for x
    x = 1,708,211.06/1,707.76
  6. Step 6: Final answer
    x = 1,000.26

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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.