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Finding the Fourth Proportional to 763.24, 1,145.10 and 694.60

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Solution

The fourth proportional to 763.24, 1,145.10 and 694.60 is: 1,042.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.24 : 1,145.10 = 694.60 : x
  2. Step 2: Convert to fraction form
    763.24/1,145.10 = 694.60/x
  3. Step 3: Cross multiply
    763.24x = 1,145.10 × 694.60
  4. Step 4: Simplify right side
    763.24x = 795,386.46
  5. Step 5: Solve for x
    x = 795,386.46/763.24
  6. Step 6: Final answer
    x = 1,042.12

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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.