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Finding the Fourth Proportional to 1,613.03, 2,418.80 and 626.31

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Solution

The fourth proportional to 1,613.03, 2,418.80 and 626.31 is: 939.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.03 : 2,418.80 = 626.31 : x
  2. Step 2: Convert to fraction form
    1,613.03/2,418.80 = 626.31/x
  3. Step 3: Cross multiply
    1,613.03x = 2,418.80 × 626.31
  4. Step 4: Simplify right side
    1,613.03x = 1,514,915.50
  5. Step 5: Solve for x
    x = 1,514,915.50/1,613.03
  6. Step 6: Final answer
    x = 939.18

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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.