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Finding the Fourth Proportional to 1,486.11, 2,229.17 and 621.03

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Solution

The fourth proportional to 1,486.11, 2,229.17 and 621.03 is: 931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.11 : 2,229.17 = 621.03 : x
  2. Step 2: Convert to fraction form
    1,486.11/2,229.17 = 621.03/x
  3. Step 3: Cross multiply
    1,486.11x = 2,229.17 × 621.03
  4. Step 4: Simplify right side
    1,486.11x = 1,384,381.45
  5. Step 5: Solve for x
    x = 1,384,381.45/1,486.11
  6. Step 6: Final answer
    x = 931.55

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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.