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Finding the Fourth Proportional to 881.70, 1,216.69 and 483.28

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Solution

The fourth proportional to 881.70, 1,216.69 and 483.28 is: 666.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.70 : 1,216.69 = 483.28 : x
  2. Step 2: Convert to fraction form
    881.70/1,216.69 = 483.28/x
  3. Step 3: Cross multiply
    881.70x = 1,216.69 × 483.28
  4. Step 4: Simplify right side
    881.70x = 587,997.69
  5. Step 5: Solve for x
    x = 587,997.69/881.70
  6. Step 6: Final answer
    x = 666.89

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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.