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Finding the Fourth Proportional to 1,142.18, 1,713.56 and 622.04

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Solution

The fourth proportional to 1,142.18, 1,713.56 and 622.04 is: 933.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.18 : 1,713.56 = 622.04 : x
  2. Step 2: Convert to fraction form
    1,142.18/1,713.56 = 622.04/x
  3. Step 3: Cross multiply
    1,142.18x = 1,713.56 × 622.04
  4. Step 4: Simplify right side
    1,142.18x = 1,065,899.75
  5. Step 5: Solve for x
    x = 1,065,899.75/1,142.18
  6. Step 6: Final answer
    x = 933.22

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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.