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Finding the Fourth Proportional to 1,537.42, 2,121.94 and 874.20

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Solution

The fourth proportional to 1,537.42, 2,121.94 and 874.20 is: 1,206.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.42 : 2,121.94 = 874.20 : x
  2. Step 2: Convert to fraction form
    1,537.42/2,121.94 = 874.20/x
  3. Step 3: Cross multiply
    1,537.42x = 2,121.94 × 874.20
  4. Step 4: Simplify right side
    1,537.42x = 1,854,999.95
  5. Step 5: Solve for x
    x = 1,854,999.95/1,537.42
  6. Step 6: Final answer
    x = 1,206.57

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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.