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Finding the Fourth Proportional to 3,987.70, 5,503.26 and 2,394.64

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Solution

The fourth proportional to 3,987.70, 5,503.26 and 2,394.64 is: 3,304.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.70 : 5,503.26 = 2,394.64 : x
  2. Step 2: Convert to fraction form
    3,987.70/5,503.26 = 2,394.64/x
  3. Step 3: Cross multiply
    3,987.70x = 5,503.26 × 2,394.64
  4. Step 4: Simplify right side
    3,987.70x = 13,178,326.53
  5. Step 5: Solve for x
    x = 13,178,326.53/3,987.70
  6. Step 6: Final answer
    x = 3,304.74

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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.