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Finding the Fourth Proportional to 1,537.98, 2,306.40 and 613.26

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Solution

The fourth proportional to 1,537.98, 2,306.40 and 613.26 is: 919.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.98 : 2,306.40 = 613.26 : x
  2. Step 2: Convert to fraction form
    1,537.98/2,306.40 = 613.26/x
  3. Step 3: Cross multiply
    1,537.98x = 2,306.40 × 613.26
  4. Step 4: Simplify right side
    1,537.98x = 1,414,422.86
  5. Step 5: Solve for x
    x = 1,414,422.86/1,537.98
  6. Step 6: Final answer
    x = 919.66

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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.