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Finding the Fourth Proportional to 891.17, 1,326.98 and 881.37

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Solution

The fourth proportional to 891.17, 1,326.98 and 881.37 is: 1,312.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.17 : 1,326.98 = 881.37 : x
  2. Step 2: Convert to fraction form
    891.17/1,326.98 = 881.37/x
  3. Step 3: Cross multiply
    891.17x = 1,326.98 × 881.37
  4. Step 4: Simplify right side
    891.17x = 1,169,555.96
  5. Step 5: Solve for x
    x = 1,169,555.96/891.17
  6. Step 6: Final answer
    x = 1,312.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.