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Finding the Fourth Proportional to 3,721.90, 5,582.69 and 948.64

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Solution

The fourth proportional to 3,721.90, 5,582.69 and 948.64 is: 1,422.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.90 : 5,582.69 = 948.64 : x
  2. Step 2: Convert to fraction form
    3,721.90/5,582.69 = 948.64/x
  3. Step 3: Cross multiply
    3,721.90x = 5,582.69 × 948.64
  4. Step 4: Simplify right side
    3,721.90x = 5,295,963.70
  5. Step 5: Solve for x
    x = 5,295,963.70/3,721.90
  6. Step 6: Final answer
    x = 1,422.92

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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.