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Finding the Fourth Proportional to 880.24, 1,319.28 and 392.74

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Solution

The fourth proportional to 880.24, 1,319.28 and 392.74 is: 588.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.24 : 1,319.28 = 392.74 : x
  2. Step 2: Convert to fraction form
    880.24/1,319.28 = 392.74/x
  3. Step 3: Cross multiply
    880.24x = 1,319.28 × 392.74
  4. Step 4: Simplify right side
    880.24x = 518,134.03
  5. Step 5: Solve for x
    x = 518,134.03/880.24
  6. Step 6: Final answer
    x = 588.63

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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.