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Finding the Fourth Proportional to 891.19, 1,335.43 and 565.57

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Solution

The fourth proportional to 891.19, 1,335.43 and 565.57 is: 847.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.19 : 1,335.43 = 565.57 : x
  2. Step 2: Convert to fraction form
    891.19/1,335.43 = 565.57/x
  3. Step 3: Cross multiply
    891.19x = 1,335.43 × 565.57
  4. Step 4: Simplify right side
    891.19x = 755,269.64
  5. Step 5: Solve for x
    x = 755,269.64/891.19
  6. Step 6: Final answer
    x = 847.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.