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Finding the Fourth Proportional to 882.60, 1,321.74 and 621.96

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Solution

The fourth proportional to 882.60, 1,321.74 and 621.96 is: 931.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.60 : 1,321.74 = 621.96 : x
  2. Step 2: Convert to fraction form
    882.60/1,321.74 = 621.96/x
  3. Step 3: Cross multiply
    882.60x = 1,321.74 × 621.96
  4. Step 4: Simplify right side
    882.60x = 822,069.41
  5. Step 5: Solve for x
    x = 822,069.41/882.60
  6. Step 6: Final answer
    x = 931.42

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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.