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Finding the Fourth Proportional to 1,778.32, 2,454.20 and 992.49

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Solution

The fourth proportional to 1,778.32, 2,454.20 and 992.49 is: 1,369.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.32 : 2,454.20 = 992.49 : x
  2. Step 2: Convert to fraction form
    1,778.32/2,454.20 = 992.49/x
  3. Step 3: Cross multiply
    1,778.32x = 2,454.20 × 992.49
  4. Step 4: Simplify right side
    1,778.32x = 2,435,768.96
  5. Step 5: Solve for x
    x = 2,435,768.96/1,778.32
  6. Step 6: Final answer
    x = 1,369.70

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1.5x scale

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.