Home / 5,141.72-7,712.58-1,678.97

Finding the Fourth Proportional to 5,141.72, 7,712.58 and 1,678.97

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Solution

The fourth proportional to 5,141.72, 7,712.58 and 1,678.97 is: 2,518.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,141.72 : 7,712.58 = 1,678.97 : x
  2. Step 2: Convert to fraction form
    5,141.72/7,712.58 = 1,678.97/x
  3. Step 3: Cross multiply
    5,141.72x = 7,712.58 × 1,678.97
  4. Step 4: Simplify right side
    5,141.72x = 12,949,209.72
  5. Step 5: Solve for x
    x = 12,949,209.72/5,141.72
  6. Step 6: Final answer
    x = 2,518.46

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Half scale
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Double scale
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Similar ratio
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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.