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Finding the Fourth Proportional to 2,825.76, 4,239.16 and 877.48

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Solution

The fourth proportional to 2,825.76, 4,239.16 and 877.48 is: 1,316.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,825.76 : 4,239.16 = 877.48 : x
  2. Step 2: Convert to fraction form
    2,825.76/4,239.16 = 877.48/x
  3. Step 3: Cross multiply
    2,825.76x = 4,239.16 × 877.48
  4. Step 4: Simplify right side
    2,825.76x = 3,719,778.12
  5. Step 5: Solve for x
    x = 3,719,778.12/2,825.76
  6. Step 6: Final answer
    x = 1,316.38

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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.