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Finding the Fourth Proportional to 874.08, 1,318.32 and 779.04

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Solution

The fourth proportional to 874.08, 1,318.32 and 779.04 is: 1,174.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.08 : 1,318.32 = 779.04 : x
  2. Step 2: Convert to fraction form
    874.08/1,318.32 = 779.04/x
  3. Step 3: Cross multiply
    874.08x = 1,318.32 × 779.04
  4. Step 4: Simplify right side
    874.08x = 1,027,024.01
  5. Step 5: Solve for x
    x = 1,027,024.01/874.08
  6. Step 6: Final answer
    x = 1,174.98

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.