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Finding the Fourth Proportional to 1,397.44, 1,930.90 and 1,148.57

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Solution

The fourth proportional to 1,397.44, 1,930.90 and 1,148.57 is: 1,587.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.44 : 1,930.90 = 1,148.57 : x
  2. Step 2: Convert to fraction form
    1,397.44/1,930.90 = 1,148.57/x
  3. Step 3: Cross multiply
    1,397.44x = 1,930.90 × 1,148.57
  4. Step 4: Simplify right side
    1,397.44x = 2,217,773.81
  5. Step 5: Solve for x
    x = 2,217,773.81/1,397.44
  6. Step 6: Final answer
    x = 1,587.03

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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.