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Finding the Fourth Proportional to 3,626.79, 5,440.19 and 1,318.47

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Solution

The fourth proportional to 3,626.79, 5,440.19 and 1,318.47 is: 1,977.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,626.79 : 5,440.19 = 1,318.47 : x
  2. Step 2: Convert to fraction form
    3,626.79/5,440.19 = 1,318.47/x
  3. Step 3: Cross multiply
    3,626.79x = 5,440.19 × 1,318.47
  4. Step 4: Simplify right side
    3,626.79x = 7,172,727.31
  5. Step 5: Solve for x
    x = 7,172,727.31/3,626.79
  6. Step 6: Final answer
    x = 1,977.71

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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.