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Finding the Fourth Proportional to 3,655.72, 5,473.80 and 1,920.68

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Solution

The fourth proportional to 3,655.72, 5,473.80 and 1,920.68 is: 2,875.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,655.72 : 5,473.80 = 1,920.68 : x
  2. Step 2: Convert to fraction form
    3,655.72/5,473.80 = 1,920.68/x
  3. Step 3: Cross multiply
    3,655.72x = 5,473.80 × 1,920.68
  4. Step 4: Simplify right side
    3,655.72x = 10,513,418.18
  5. Step 5: Solve for x
    x = 10,513,418.18/3,655.72
  6. Step 6: Final answer
    x = 2,875.88

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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.