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Finding the Fourth Proportional to 695.56, 1,038.82 and 630.43

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Solution

The fourth proportional to 695.56, 1,038.82 and 630.43 is: 941.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.56 : 1,038.82 = 630.43 : x
  2. Step 2: Convert to fraction form
    695.56/1,038.82 = 630.43/x
  3. Step 3: Cross multiply
    695.56x = 1,038.82 × 630.43
  4. Step 4: Simplify right side
    695.56x = 654,903.29
  5. Step 5: Solve for x
    x = 654,903.29/695.56
  6. Step 6: Final answer
    x = 941.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.