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Finding the Fourth Proportional to 881.93, 1,215.65 and 695.11

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Solution

The fourth proportional to 881.93, 1,215.65 and 695.11 is: 958.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.93 : 1,215.65 = 695.11 : x
  2. Step 2: Convert to fraction form
    881.93/1,215.65 = 695.11/x
  3. Step 3: Cross multiply
    881.93x = 1,215.65 × 695.11
  4. Step 4: Simplify right side
    881.93x = 845,000.92
  5. Step 5: Solve for x
    x = 845,000.92/881.93
  6. Step 6: Final answer
    x = 958.13

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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.