Home / 1,281.36-1,920.64-1,177.57

Finding the Fourth Proportional to 1,281.36, 1,920.64 and 1,177.57

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Solution

The fourth proportional to 1,281.36, 1,920.64 and 1,177.57 is: 1,765.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.36 : 1,920.64 = 1,177.57 : x
  2. Step 2: Convert to fraction form
    1,281.36/1,920.64 = 1,177.57/x
  3. Step 3: Cross multiply
    1,281.36x = 1,920.64 × 1,177.57
  4. Step 4: Simplify right side
    1,281.36x = 2,261,688.04
  5. Step 5: Solve for x
    x = 2,261,688.04/1,281.36
  6. Step 6: Final answer
    x = 1,765.07

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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.