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Finding the Fourth Proportional to 5,645.62, 7,790.43 and 3,407.86

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Solution

The fourth proportional to 5,645.62, 7,790.43 and 3,407.86 is: 4,702.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,645.62 : 7,790.43 = 3,407.86 : x
  2. Step 2: Convert to fraction form
    5,645.62/7,790.43 = 3,407.86/x
  3. Step 3: Cross multiply
    5,645.62x = 7,790.43 × 3,407.86
  4. Step 4: Simplify right side
    5,645.62x = 26,548,694.78
  5. Step 5: Solve for x
    x = 26,548,694.78/5,645.62
  6. Step 6: Final answer
    x = 4,702.53

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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.