Home / 5,173.84-7,760.76-1,278.28

Finding the Fourth Proportional to 5,173.84, 7,760.76 and 1,278.28

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Solution

The fourth proportional to 5,173.84, 7,760.76 and 1,278.28 is: 1,917.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,173.84 : 7,760.76 = 1,278.28 : x
  2. Step 2: Convert to fraction form
    5,173.84/7,760.76 = 1,278.28/x
  3. Step 3: Cross multiply
    5,173.84x = 7,760.76 × 1,278.28
  4. Step 4: Simplify right side
    5,173.84x = 9,920,424.29
  5. Step 5: Solve for x
    x = 9,920,424.29/5,173.84
  6. Step 6: Final answer
    x = 1,917.42

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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.