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Finding the Fourth Proportional to 1,254.23, 1,730.80 and 723.10

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Solution

The fourth proportional to 1,254.23, 1,730.80 and 723.10 is: 997.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.23 : 1,730.80 = 723.10 : x
  2. Step 2: Convert to fraction form
    1,254.23/1,730.80 = 723.10/x
  3. Step 3: Cross multiply
    1,254.23x = 1,730.80 × 723.10
  4. Step 4: Simplify right side
    1,254.23x = 1,251,546.17
  5. Step 5: Solve for x
    x = 1,251,546.17/1,254.23
  6. Step 6: Final answer
    x = 997.86

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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.