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Finding the Fourth Proportional to 3,765.65, 5,648.51 and 992.72

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Solution

The fourth proportional to 3,765.65, 5,648.51 and 992.72 is: 1,489.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,765.65 : 5,648.51 = 992.72 : x
  2. Step 2: Convert to fraction form
    3,765.65/5,648.51 = 992.72/x
  3. Step 3: Cross multiply
    3,765.65x = 5,648.51 × 992.72
  4. Step 4: Simplify right side
    3,765.65x = 5,607,355.64
  5. Step 5: Solve for x
    x = 5,607,355.64/3,765.65
  6. Step 6: Final answer
    x = 1,489.08

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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.