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Finding the Fourth Proportional to 3,139.95, 4,709.93 and 1,499.70

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Solution

The fourth proportional to 3,139.95, 4,709.93 and 1,499.70 is: 2,249.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.95 : 4,709.93 = 1,499.70 : x
  2. Step 2: Convert to fraction form
    3,139.95/4,709.93 = 1,499.70/x
  3. Step 3: Cross multiply
    3,139.95x = 4,709.93 × 1,499.70
  4. Step 4: Simplify right side
    3,139.95x = 7,063,474.52
  5. Step 5: Solve for x
    x = 7,063,474.52/3,139.95
  6. Step 6: Final answer
    x = 2,249.55

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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.