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Finding the Fourth Proportional to 723.13, 999.11 and 695.78

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Solution

The fourth proportional to 723.13, 999.11 and 695.78 is: 961.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.13 : 999.11 = 695.78 : x
  2. Step 2: Convert to fraction form
    723.13/999.11 = 695.78/x
  3. Step 3: Cross multiply
    723.13x = 999.11 × 695.78
  4. Step 4: Simplify right side
    723.13x = 695,160.76
  5. Step 5: Solve for x
    x = 695,160.76/723.13
  6. Step 6: Final answer
    x = 961.32

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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.