Home / 1,231.86-1,836.95-1,220.76

Finding the Fourth Proportional to 1,231.86, 1,836.95 and 1,220.76

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Solution

The fourth proportional to 1,231.86, 1,836.95 and 1,220.76 is: 1,820.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.86 : 1,836.95 = 1,220.76 : x
  2. Step 2: Convert to fraction form
    1,231.86/1,836.95 = 1,220.76/x
  3. Step 3: Cross multiply
    1,231.86x = 1,836.95 × 1,220.76
  4. Step 4: Simplify right side
    1,231.86x = 2,242,459.79
  5. Step 5: Solve for x
    x = 2,242,459.79/1,231.86
  6. Step 6: Final answer
    x = 1,820.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.