Home / 1,280.52-1,765.73-1,113.26

Finding the Fourth Proportional to 1,280.52, 1,765.73 and 1,113.26

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Solution

The fourth proportional to 1,280.52, 1,765.73 and 1,113.26 is: 1,535.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.52 : 1,765.73 = 1,113.26 : x
  2. Step 2: Convert to fraction form
    1,280.52/1,765.73 = 1,113.26/x
  3. Step 3: Cross multiply
    1,280.52x = 1,765.73 × 1,113.26
  4. Step 4: Simplify right side
    1,280.52x = 1,965,710.53
  5. Step 5: Solve for x
    x = 1,965,710.53/1,280.52
  6. Step 6: Final answer
    x = 1,535.09

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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.