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Finding the Fourth Proportional to 888.81, 1,331.60 and 655.13

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Solution

The fourth proportional to 888.81, 1,331.60 and 655.13 is: 981.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.81 : 1,331.60 = 655.13 : x
  2. Step 2: Convert to fraction form
    888.81/1,331.60 = 655.13/x
  3. Step 3: Cross multiply
    888.81x = 1,331.60 × 655.13
  4. Step 4: Simplify right side
    888.81x = 872,361.17
  5. Step 5: Solve for x
    x = 872,361.17/888.81
  6. Step 6: Final answer
    x = 981.49

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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.