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Finding the Fourth Proportional to 1,531.68, 2,297.28 and 665.76

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Solution

The fourth proportional to 1,531.68, 2,297.28 and 665.76 is: 998.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.68 : 2,297.28 = 665.76 : x
  2. Step 2: Convert to fraction form
    1,531.68/2,297.28 = 665.76/x
  3. Step 3: Cross multiply
    1,531.68x = 2,297.28 × 665.76
  4. Step 4: Simplify right side
    1,531.68x = 1,529,437.13
  5. Step 5: Solve for x
    x = 1,529,437.13/1,531.68
  6. Step 6: Final answer
    x = 998.54

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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.