Home / 1,432.90-2,149.39-392.92

Finding the Fourth Proportional to 1,432.90, 2,149.39 and 392.92

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Solution

The fourth proportional to 1,432.90, 2,149.39 and 392.92 is: 589.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.90 : 2,149.39 = 392.92 : x
  2. Step 2: Convert to fraction form
    1,432.90/2,149.39 = 392.92/x
  3. Step 3: Cross multiply
    1,432.90x = 2,149.39 × 392.92
  4. Step 4: Simplify right side
    1,432.90x = 844,533.44
  5. Step 5: Solve for x
    x = 844,533.44/1,432.90
  6. Step 6: Final answer
    x = 589.39

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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.