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Finding the Fourth Proportional to 756.18, 1,045.17 and 697.86

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Solution

The fourth proportional to 756.18, 1,045.17 and 697.86 is: 964.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.18 : 1,045.17 = 697.86 : x
  2. Step 2: Convert to fraction form
    756.18/1,045.17 = 697.86/x
  3. Step 3: Cross multiply
    756.18x = 1,045.17 × 697.86
  4. Step 4: Simplify right side
    756.18x = 729,382.34
  5. Step 5: Solve for x
    x = 729,382.34/756.18
  6. Step 6: Final answer
    x = 964.56

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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.