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Finding the Fourth Proportional to 5,198.70, 7,798.05 and 3,125.10

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Solution

The fourth proportional to 5,198.70, 7,798.05 and 3,125.10 is: 4,687.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,198.70 : 7,798.05 = 3,125.10 : x
  2. Step 2: Convert to fraction form
    5,198.70/7,798.05 = 3,125.10/x
  3. Step 3: Cross multiply
    5,198.70x = 7,798.05 × 3,125.10
  4. Step 4: Simplify right side
    5,198.70x = 24,369,686.06
  5. Step 5: Solve for x
    x = 24,369,686.06/5,198.70
  6. Step 6: Final answer
    x = 4,687.65

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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.