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Finding the Fourth Proportional to 2,378.75, 3,565.71 and 992.85

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Solution

The fourth proportional to 2,378.75, 3,565.71 and 992.85 is: 1,488.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,378.75 : 3,565.71 = 992.85 : x
  2. Step 2: Convert to fraction form
    2,378.75/3,565.71 = 992.85/x
  3. Step 3: Cross multiply
    2,378.75x = 3,565.71 × 992.85
  4. Step 4: Simplify right side
    2,378.75x = 3,540,215.17
  5. Step 5: Solve for x
    x = 3,540,215.17/2,378.75
  6. Step 6: Final answer
    x = 1,488.27

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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.