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Finding the Fourth Proportional to 695.15, 961.02 and 689.07

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Solution

The fourth proportional to 695.15, 961.02 and 689.07 is: 952.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.15 : 961.02 = 689.07 : x
  2. Step 2: Convert to fraction form
    695.15/961.02 = 689.07/x
  3. Step 3: Cross multiply
    695.15x = 961.02 × 689.07
  4. Step 4: Simplify right side
    695.15x = 662,210.05
  5. Step 5: Solve for x
    x = 662,210.05/695.15
  6. Step 6: Final answer
    x = 952.62

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1.5x scale

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.