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Finding the Fourth Proportional to 696.45, 1,045.17 and 331.32

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Solution

The fourth proportional to 696.45, 1,045.17 and 331.32 is: 497.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.45 : 1,045.17 = 331.32 : x
  2. Step 2: Convert to fraction form
    696.45/1,045.17 = 331.32/x
  3. Step 3: Cross multiply
    696.45x = 1,045.17 × 331.32
  4. Step 4: Simplify right side
    696.45x = 346,285.72
  5. Step 5: Solve for x
    x = 346,285.72/696.45
  6. Step 6: Final answer
    x = 497.22

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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.