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Finding the Fourth Proportional to 879.32, 1,318.52 and 440.10

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Solution

The fourth proportional to 879.32, 1,318.52 and 440.10 is: 659.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.32 : 1,318.52 = 440.10 : x
  2. Step 2: Convert to fraction form
    879.32/1,318.52 = 440.10/x
  3. Step 3: Cross multiply
    879.32x = 1,318.52 × 440.10
  4. Step 4: Simplify right side
    879.32x = 580,280.65
  5. Step 5: Solve for x
    x = 580,280.65/879.32
  6. Step 6: Final answer
    x = 659.92

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1.5x scale

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.