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Finding the Fourth Proportional to 695.10, 958.68 and 555.21

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Solution

The fourth proportional to 695.10, 958.68 and 555.21 is: 765.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.10 : 958.68 = 555.21 : x
  2. Step 2: Convert to fraction form
    695.10/958.68 = 555.21/x
  3. Step 3: Cross multiply
    695.10x = 958.68 × 555.21
  4. Step 4: Simplify right side
    695.10x = 532,268.72
  5. Step 5: Solve for x
    x = 532,268.72/695.10
  6. Step 6: Final answer
    x = 765.74

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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.