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Finding the Fourth Proportional to 5,390.92, 7,440.42 and 5,144.68

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Solution

The fourth proportional to 5,390.92, 7,440.42 and 5,144.68 is: 7,100.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.92 : 7,440.42 = 5,144.68 : x
  2. Step 2: Convert to fraction form
    5,390.92/7,440.42 = 5,144.68/x
  3. Step 3: Cross multiply
    5,390.92x = 7,440.42 × 5,144.68
  4. Step 4: Simplify right side
    5,390.92x = 38,278,579.97
  5. Step 5: Solve for x
    x = 38,278,579.97/5,390.92
  6. Step 6: Final answer
    x = 7,100.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.