Home / 2,353.86-3,531.80-1,121.28

Finding the Fourth Proportional to 2,353.86, 3,531.80 and 1,121.28

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Solution

The fourth proportional to 2,353.86, 3,531.80 and 1,121.28 is: 1,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,353.86 : 3,531.80 = 1,121.28 : x
  2. Step 2: Convert to fraction form
    2,353.86/3,531.80 = 1,121.28/x
  3. Step 3: Cross multiply
    2,353.86x = 3,531.80 × 1,121.28
  4. Step 4: Simplify right side
    2,353.86x = 3,960,126.26
  5. Step 5: Solve for x
    x = 3,960,126.26/2,353.86
  6. Step 6: Final answer
    x = 1,682.40

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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.