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Finding the Fourth Proportional to 882.96, 1,217.88 and 621.04

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Solution

The fourth proportional to 882.96, 1,217.88 and 621.04 is: 856.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.96 : 1,217.88 = 621.04 : x
  2. Step 2: Convert to fraction form
    882.96/1,217.88 = 621.04/x
  3. Step 3: Cross multiply
    882.96x = 1,217.88 × 621.04
  4. Step 4: Simplify right side
    882.96x = 756,352.20
  5. Step 5: Solve for x
    x = 756,352.20/882.96
  6. Step 6: Final answer
    x = 856.61

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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.