Home / 1,277.67-1,765.50-1,102.71

Finding the Fourth Proportional to 1,277.67, 1,765.50 and 1,102.71

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Solution

The fourth proportional to 1,277.67, 1,765.50 and 1,102.71 is: 1,523.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.67 : 1,765.50 = 1,102.71 : x
  2. Step 2: Convert to fraction form
    1,277.67/1,765.50 = 1,102.71/x
  3. Step 3: Cross multiply
    1,277.67x = 1,765.50 × 1,102.71
  4. Step 4: Simplify right side
    1,277.67x = 1,946,834.51
  5. Step 5: Solve for x
    x = 1,946,834.51/1,277.67
  6. Step 6: Final answer
    x = 1,523.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.