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Finding the Fourth Proportional to 2,013.52, 3,019.68 and 781.12

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Solution

The fourth proportional to 2,013.52, 3,019.68 and 781.12 is: 1,171.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,013.52 : 3,019.68 = 781.12 : x
  2. Step 2: Convert to fraction form
    2,013.52/3,019.68 = 781.12/x
  3. Step 3: Cross multiply
    2,013.52x = 3,019.68 × 781.12
  4. Step 4: Simplify right side
    2,013.52x = 2,358,732.44
  5. Step 5: Solve for x
    x = 2,358,732.44/2,013.52
  6. Step 6: Final answer
    x = 1,171.45

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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.