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Finding the Fourth Proportional to 696.04, 1,042.06 and 647.38

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Solution

The fourth proportional to 696.04, 1,042.06 and 647.38 is: 969.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.04 : 1,042.06 = 647.38 : x
  2. Step 2: Convert to fraction form
    696.04/1,042.06 = 647.38/x
  3. Step 3: Cross multiply
    696.04x = 1,042.06 × 647.38
  4. Step 4: Simplify right side
    696.04x = 674,608.80
  5. Step 5: Solve for x
    x = 674,608.80/696.04
  6. Step 6: Final answer
    x = 969.21

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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.