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Finding the Fourth Proportional to 1,001.22, 1,381.80 and 608.22

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Solution

The fourth proportional to 1,001.22, 1,381.80 and 608.22 is: 839.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.22 : 1,381.80 = 608.22 : x
  2. Step 2: Convert to fraction form
    1,001.22/1,381.80 = 608.22/x
  3. Step 3: Cross multiply
    1,001.22x = 1,381.80 × 608.22
  4. Step 4: Simplify right side
    1,001.22x = 840,438.40
  5. Step 5: Solve for x
    x = 840,438.40/1,001.22
  6. Step 6: Final answer
    x = 839.41

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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.