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Finding the Fourth Proportional to 880, 1,319.74 and 417.32

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Solution

The fourth proportional to 880, 1,319.74 and 417.32 is: 625.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    880 : 1,319.74 = 417.32 : x
  2. Step 2: Convert to fraction form
    880/1,319.74 = 417.32/x
  3. Step 3: Cross multiply
    880x = 1,319.74 × 417.32
  4. Step 4: Simplify right side
    880x = 550,753.90
  5. Step 5: Solve for x
    x = 550,753.90/880
  6. Step 6: Final answer
    x = 625.86

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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.