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Finding the Fourth Proportional to 1,132.36, 1,563.16 and 690.43

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Solution

The fourth proportional to 1,132.36, 1,563.16 and 690.43 is: 953.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.36 : 1,563.16 = 690.43 : x
  2. Step 2: Convert to fraction form
    1,132.36/1,563.16 = 690.43/x
  3. Step 3: Cross multiply
    1,132.36x = 1,563.16 × 690.43
  4. Step 4: Simplify right side
    1,132.36x = 1,079,252.56
  5. Step 5: Solve for x
    x = 1,079,252.56/1,132.36
  6. Step 6: Final answer
    x = 953.10

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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.