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Finding the Fourth Proportional to 1,537.76, 2,122.15 and 874.72

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Solution

The fourth proportional to 1,537.76, 2,122.15 and 874.72 is: 1,207.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.76 : 2,122.15 = 874.72 : x
  2. Step 2: Convert to fraction form
    1,537.76/2,122.15 = 874.72/x
  3. Step 3: Cross multiply
    1,537.76x = 2,122.15 × 874.72
  4. Step 4: Simplify right side
    1,537.76x = 1,856,287.05
  5. Step 5: Solve for x
    x = 1,856,287.05/1,537.76
  6. Step 6: Final answer
    x = 1,207.14

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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.