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Finding the Fourth Proportional to 3,972.79, 5,482.71 and 2,645.60

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Solution

The fourth proportional to 3,972.79, 5,482.71 and 2,645.60 is: 3,651.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,972.79 : 5,482.71 = 2,645.60 : x
  2. Step 2: Convert to fraction form
    3,972.79/5,482.71 = 2,645.60/x
  3. Step 3: Cross multiply
    3,972.79x = 5,482.71 × 2,645.60
  4. Step 4: Simplify right side
    3,972.79x = 14,505,071.28
  5. Step 5: Solve for x
    x = 14,505,071.28/3,972.79
  6. Step 6: Final answer
    x = 3,651.11

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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.