Home / 1,431.52-2,149.26-738.76

Finding the Fourth Proportional to 1,431.52, 2,149.26 and 738.76

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Solution

The fourth proportional to 1,431.52, 2,149.26 and 738.76 is: 1,109.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.52 : 2,149.26 = 738.76 : x
  2. Step 2: Convert to fraction form
    1,431.52/2,149.26 = 738.76/x
  3. Step 3: Cross multiply
    1,431.52x = 2,149.26 × 738.76
  4. Step 4: Simplify right side
    1,431.52x = 1,587,787.32
  5. Step 5: Solve for x
    x = 1,587,787.32/1,431.52
  6. Step 6: Final answer
    x = 1,109.16

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1.5x scale

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.