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Finding the Fourth Proportional to 3,580.62, 5,367.87 and 1,390.92

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Solution

The fourth proportional to 3,580.62, 5,367.87 and 1,390.92 is: 2,085.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,580.62 : 5,367.87 = 1,390.92 : x
  2. Step 2: Convert to fraction form
    3,580.62/5,367.87 = 1,390.92/x
  3. Step 3: Cross multiply
    3,580.62x = 5,367.87 × 1,390.92
  4. Step 4: Simplify right side
    3,580.62x = 7,466,277.74
  5. Step 5: Solve for x
    x = 7,466,277.74/3,580.62
  6. Step 6: Final answer
    x = 2,085.19

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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.