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Finding the Fourth Proportional to 881.23, 1,320.76 and 448.15

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Solution

The fourth proportional to 881.23, 1,320.76 and 448.15 is: 671.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.23 : 1,320.76 = 448.15 : x
  2. Step 2: Convert to fraction form
    881.23/1,320.76 = 448.15/x
  3. Step 3: Cross multiply
    881.23x = 1,320.76 × 448.15
  4. Step 4: Simplify right side
    881.23x = 591,898.59
  5. Step 5: Solve for x
    x = 591,898.59/881.23
  6. Step 6: Final answer
    x = 671.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.