Home / 2,971.86-4,455.36-1,121.92

Finding the Fourth Proportional to 2,971.86, 4,455.36 and 1,121.92

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Solution

The fourth proportional to 2,971.86, 4,455.36 and 1,121.92 is: 1,681.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.86 : 4,455.36 = 1,121.92 : x
  2. Step 2: Convert to fraction form
    2,971.86/4,455.36 = 1,121.92/x
  3. Step 3: Cross multiply
    2,971.86x = 4,455.36 × 1,121.92
  4. Step 4: Simplify right side
    2,971.86x = 4,998,557.49
  5. Step 5: Solve for x
    x = 4,998,557.49/2,971.86
  6. Step 6: Final answer
    x = 1,681.96

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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.