Home / 1,432.28-1,975.20-1,138.52

Finding the Fourth Proportional to 1,432.28, 1,975.20 and 1,138.52

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Solution

The fourth proportional to 1,432.28, 1,975.20 and 1,138.52 is: 1,570.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.28 : 1,975.20 = 1,138.52 : x
  2. Step 2: Convert to fraction form
    1,432.28/1,975.20 = 1,138.52/x
  3. Step 3: Cross multiply
    1,432.28x = 1,975.20 × 1,138.52
  4. Step 4: Simplify right side
    1,432.28x = 2,248,804.70
  5. Step 5: Solve for x
    x = 2,248,804.70/1,432.28
  6. Step 6: Final answer
    x = 1,570.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.