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Finding the Fourth Proportional to 1,052.69, 1,578.85 and 743.58

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Solution

The fourth proportional to 1,052.69, 1,578.85 and 743.58 is: 1,115.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052.69 : 1,578.85 = 743.58 : x
  2. Step 2: Convert to fraction form
    1,052.69/1,578.85 = 743.58/x
  3. Step 3: Cross multiply
    1,052.69x = 1,578.85 × 743.58
  4. Step 4: Simplify right side
    1,052.69x = 1,173,999.42
  5. Step 5: Solve for x
    x = 1,173,999.42/1,052.69
  6. Step 6: Final answer
    x = 1,115.24

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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.