Home / 1,639.67-2,262.60-976.55

Finding the Fourth Proportional to 1,639.67, 2,262.60 and 976.55

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Solution

The fourth proportional to 1,639.67, 2,262.60 and 976.55 is: 1,347.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.67 : 2,262.60 = 976.55 : x
  2. Step 2: Convert to fraction form
    1,639.67/2,262.60 = 976.55/x
  3. Step 3: Cross multiply
    1,639.67x = 2,262.60 × 976.55
  4. Step 4: Simplify right side
    1,639.67x = 2,209,530.72
  5. Step 5: Solve for x
    x = 2,209,530.72/1,639.67
  6. Step 6: Final answer
    x = 1,347.55

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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.