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Finding the Fourth Proportional to 881.02, 1,215.90 and 659.58

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Solution

The fourth proportional to 881.02, 1,215.90 and 659.58 is: 910.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.02 : 1,215.90 = 659.58 : x
  2. Step 2: Convert to fraction form
    881.02/1,215.90 = 659.58/x
  3. Step 3: Cross multiply
    881.02x = 1,215.90 × 659.58
  4. Step 4: Simplify right side
    881.02x = 801,983.32
  5. Step 5: Solve for x
    x = 801,983.32/881.02
  6. Step 6: Final answer
    x = 910.29

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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.