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Finding the Fourth Proportional to 881.92, 1,216.80 and 694.83

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Solution

The fourth proportional to 881.92, 1,216.80 and 694.83 is: 958.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.92 : 1,216.80 = 694.83 : x
  2. Step 2: Convert to fraction form
    881.92/1,216.80 = 694.83/x
  3. Step 3: Cross multiply
    881.92x = 1,216.80 × 694.83
  4. Step 4: Simplify right side
    881.92x = 845,461.76
  5. Step 5: Solve for x
    x = 845,461.76/881.92
  6. Step 6: Final answer
    x = 958.66

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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.