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Finding the Fourth Proportional to 5,420.61, 7,480.22 and 3,062.84

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Solution

The fourth proportional to 5,420.61, 7,480.22 and 3,062.84 is: 4,226.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.61 : 7,480.22 = 3,062.84 : x
  2. Step 2: Convert to fraction form
    5,420.61/7,480.22 = 3,062.84/x
  3. Step 3: Cross multiply
    5,420.61x = 7,480.22 × 3,062.84
  4. Step 4: Simplify right side
    5,420.61x = 22,910,701.71
  5. Step 5: Solve for x
    x = 22,910,701.71/5,420.61
  6. Step 6: Final answer
    x = 4,226.59

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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.