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Finding the Fourth Proportional to 891.34, 1,335.49 and 480.06

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Solution

The fourth proportional to 891.34, 1,335.49 and 480.06 is: 719.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.34 : 1,335.49 = 480.06 : x
  2. Step 2: Convert to fraction form
    891.34/1,335.49 = 480.06/x
  3. Step 3: Cross multiply
    891.34x = 1,335.49 × 480.06
  4. Step 4: Simplify right side
    891.34x = 641,114.13
  5. Step 5: Solve for x
    x = 641,114.13/891.34
  6. Step 6: Final answer
    x = 719.27

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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.