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Finding the Fourth Proportional to 1,581.32, 2,372.46 and 657.31

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Solution

The fourth proportional to 1,581.32, 2,372.46 and 657.31 is: 986.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.32 : 2,372.46 = 657.31 : x
  2. Step 2: Convert to fraction form
    1,581.32/2,372.46 = 657.31/x
  3. Step 3: Cross multiply
    1,581.32x = 2,372.46 × 657.31
  4. Step 4: Simplify right side
    1,581.32x = 1,559,429.82
  5. Step 5: Solve for x
    x = 1,559,429.82/1,581.32
  6. Step 6: Final answer
    x = 986.16

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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.