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Finding the Fourth Proportional to 3,888.70, 5,364.02 and 2,489.02

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Solution

The fourth proportional to 3,888.70, 5,364.02 and 2,489.02 is: 3,433.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.70 : 5,364.02 = 2,489.02 : x
  2. Step 2: Convert to fraction form
    3,888.70/5,364.02 = 2,489.02/x
  3. Step 3: Cross multiply
    3,888.70x = 5,364.02 × 2,489.02
  4. Step 4: Simplify right side
    3,888.70x = 13,351,153.06
  5. Step 5: Solve for x
    x = 13,351,153.06/3,888.70
  6. Step 6: Final answer
    x = 3,433.32

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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.