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Finding the Fourth Proportional to 3,988.92, 5,503.56 and 2,310.32

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Solution

The fourth proportional to 3,988.92, 5,503.56 and 2,310.32 is: 3,187.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.92 : 5,503.56 = 2,310.32 : x
  2. Step 2: Convert to fraction form
    3,988.92/5,503.56 = 2,310.32/x
  3. Step 3: Cross multiply
    3,988.92x = 5,503.56 × 2,310.32
  4. Step 4: Simplify right side
    3,988.92x = 12,714,984.74
  5. Step 5: Solve for x
    x = 12,714,984.74/3,988.92
  6. Step 6: Final answer
    x = 3,187.58

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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.