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Finding the Fourth Proportional to 3,888.48, 5,340 and 3,328.92

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Solution

The fourth proportional to 3,888.48, 5,340 and 3,328.92 is: 4,571.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.48 : 5,340 = 3,328.92 : x
  2. Step 2: Convert to fraction form
    3,888.48/5,340 = 3,328.92/x
  3. Step 3: Cross multiply
    3,888.48x = 5,340 × 3,328.92
  4. Step 4: Simplify right side
    3,888.48x = 17,776,432.80
  5. Step 5: Solve for x
    x = 17,776,432.80/3,888.48
  6. Step 6: Final answer
    x = 4,571.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.