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Finding the Fourth Proportional to 4,721.28, 7,082.88 and 1,645.44

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Solution

The fourth proportional to 4,721.28, 7,082.88 and 1,645.44 is: 2,468.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,721.28 : 7,082.88 = 1,645.44 : x
  2. Step 2: Convert to fraction form
    4,721.28/7,082.88 = 1,645.44/x
  3. Step 3: Cross multiply
    4,721.28x = 7,082.88 × 1,645.44
  4. Step 4: Simplify right side
    4,721.28x = 11,654,454.07
  5. Step 5: Solve for x
    x = 11,654,454.07/4,721.28
  6. Step 6: Final answer
    x = 2,468.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.