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Finding the Fourth Proportional to 881.05, 1,215.86 and 488.06

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Solution

The fourth proportional to 881.05, 1,215.86 and 488.06 is: 673.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.05 : 1,215.86 = 488.06 : x
  2. Step 2: Convert to fraction form
    881.05/1,215.86 = 488.06/x
  3. Step 3: Cross multiply
    881.05x = 1,215.86 × 488.06
  4. Step 4: Simplify right side
    881.05x = 593,412.63
  5. Step 5: Solve for x
    x = 593,412.63/881.05
  6. Step 6: Final answer
    x = 673.53

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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.