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Finding the Fourth Proportional to 880.24, 1,320.71 and 392.96

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Solution

The fourth proportional to 880.24, 1,320.71 and 392.96 is: 589.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.24 : 1,320.71 = 392.96 : x
  2. Step 2: Convert to fraction form
    880.24/1,320.71 = 392.96/x
  3. Step 3: Cross multiply
    880.24x = 1,320.71 × 392.96
  4. Step 4: Simplify right side
    880.24x = 518,986.20
  5. Step 5: Solve for x
    x = 518,986.20/880.24
  6. Step 6: Final answer
    x = 589.60

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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.