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Finding the Fourth Proportional to 882.02, 1,217.28 and 660.58

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Solution

The fourth proportional to 882.02, 1,217.28 and 660.58 is: 911.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.02 : 1,217.28 = 660.58 : x
  2. Step 2: Convert to fraction form
    882.02/1,217.28 = 660.58/x
  3. Step 3: Cross multiply
    882.02x = 1,217.28 × 660.58
  4. Step 4: Simplify right side
    882.02x = 804,110.82
  5. Step 5: Solve for x
    x = 804,110.82/882.02
  6. Step 6: Final answer
    x = 911.67

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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.