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Finding the Fourth Proportional to 881.17, 1,215.93 and 488.20

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Solution

The fourth proportional to 881.17, 1,215.93 and 488.20 is: 673.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.17 : 1,215.93 = 488.20 : x
  2. Step 2: Convert to fraction form
    881.17/1,215.93 = 488.20/x
  3. Step 3: Cross multiply
    881.17x = 1,215.93 × 488.20
  4. Step 4: Simplify right side
    881.17x = 593,617.03
  5. Step 5: Solve for x
    x = 593,617.03/881.17
  6. Step 6: Final answer
    x = 673.67

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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.