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Finding the Fourth Proportional to 1,052.56, 1,578.90 and 403.24

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Solution

The fourth proportional to 1,052.56, 1,578.90 and 403.24 is: 604.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052.56 : 1,578.90 = 403.24 : x
  2. Step 2: Convert to fraction form
    1,052.56/1,578.90 = 403.24/x
  3. Step 3: Cross multiply
    1,052.56x = 1,578.90 × 403.24
  4. Step 4: Simplify right side
    1,052.56x = 636,675.64
  5. Step 5: Solve for x
    x = 636,675.64/1,052.56
  6. Step 6: Final answer
    x = 604.88

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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.