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Finding the Fourth Proportional to 695.96, 1,045.14 and 618.05

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Solution

The fourth proportional to 695.96, 1,045.14 and 618.05 is: 928.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.96 : 1,045.14 = 618.05 : x
  2. Step 2: Convert to fraction form
    695.96/1,045.14 = 618.05/x
  3. Step 3: Cross multiply
    695.96x = 1,045.14 × 618.05
  4. Step 4: Simplify right side
    695.96x = 645,948.78
  5. Step 5: Solve for x
    x = 645,948.78/695.96
  6. Step 6: Final answer
    x = 928.14

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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.