Home / 1,538.20-2,308.38-673.12

Finding the Fourth Proportional to 1,538.20, 2,308.38 and 673.12

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Solution

The fourth proportional to 1,538.20, 2,308.38 and 673.12 is: 1,010.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.20 : 2,308.38 = 673.12 : x
  2. Step 2: Convert to fraction form
    1,538.20/2,308.38 = 673.12/x
  3. Step 3: Cross multiply
    1,538.20x = 2,308.38 × 673.12
  4. Step 4: Simplify right side
    1,538.20x = 1,553,816.75
  5. Step 5: Solve for x
    x = 1,553,816.75/1,538.20
  6. Step 6: Final answer
    x = 1,010.15

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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.