Home / 1,280.58-1,765.47-1,252.98

Finding the Fourth Proportional to 1,280.58, 1,765.47 and 1,252.98

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Solution

The fourth proportional to 1,280.58, 1,765.47 and 1,252.98 is: 1,727.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.58 : 1,765.47 = 1,252.98 : x
  2. Step 2: Convert to fraction form
    1,280.58/1,765.47 = 1,252.98/x
  3. Step 3: Cross multiply
    1,280.58x = 1,765.47 × 1,252.98
  4. Step 4: Simplify right side
    1,280.58x = 2,212,098.60
  5. Step 5: Solve for x
    x = 2,212,098.60/1,280.58
  6. Step 6: Final answer
    x = 1,727.42

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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.