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Finding the Fourth Proportional to 3,140.70, 4,709.34 and 1,264.92

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Solution

The fourth proportional to 3,140.70, 4,709.34 and 1,264.92 is: 1,896.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.70 : 4,709.34 = 1,264.92 : x
  2. Step 2: Convert to fraction form
    3,140.70/4,709.34 = 1,264.92/x
  3. Step 3: Cross multiply
    3,140.70x = 4,709.34 × 1,264.92
  4. Step 4: Simplify right side
    3,140.70x = 5,956,938.35
  5. Step 5: Solve for x
    x = 5,956,938.35/3,140.70
  6. Step 6: Final answer
    x = 1,896.69

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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.