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Finding the Fourth Proportional to 1,165.31, 1,608.03 and 693.17

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Solution

The fourth proportional to 1,165.31, 1,608.03 and 693.17 is: 956.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.31 : 1,608.03 = 693.17 : x
  2. Step 2: Convert to fraction form
    1,165.31/1,608.03 = 693.17/x
  3. Step 3: Cross multiply
    1,165.31x = 1,608.03 × 693.17
  4. Step 4: Simplify right side
    1,165.31x = 1,114,630.11
  5. Step 5: Solve for x
    x = 1,114,630.11/1,165.31
  6. Step 6: Final answer
    x = 956.51

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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.