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Finding the Fourth Proportional to 5,487.73, 7,574.49 and 3,390.64

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Solution

The fourth proportional to 5,487.73, 7,574.49 and 3,390.64 is: 4,679.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,487.73 : 7,574.49 = 3,390.64 : x
  2. Step 2: Convert to fraction form
    5,487.73/7,574.49 = 3,390.64/x
  3. Step 3: Cross multiply
    5,487.73x = 7,574.49 × 3,390.64
  4. Step 4: Simplify right side
    5,487.73x = 25,682,368.77
  5. Step 5: Solve for x
    x = 25,682,368.77/5,487.73
  6. Step 6: Final answer
    x = 4,679.96

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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.