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Finding the Fourth Proportional to 881.98, 1,320.90 and 622.24

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Solution

The fourth proportional to 881.98, 1,320.90 and 622.24 is: 931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.98 : 1,320.90 = 622.24 : x
  2. Step 2: Convert to fraction form
    881.98/1,320.90 = 622.24/x
  3. Step 3: Cross multiply
    881.98x = 1,320.90 × 622.24
  4. Step 4: Simplify right side
    881.98x = 821,916.82
  5. Step 5: Solve for x
    x = 821,916.82/881.98
  6. Step 6: Final answer
    x = 931.90

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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.