Home / 1,282.15-1,766.95-1,123.75

Finding the Fourth Proportional to 1,282.15, 1,766.95 and 1,123.75

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Solution

The fourth proportional to 1,282.15, 1,766.95 and 1,123.75 is: 1,548.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.15 : 1,766.95 = 1,123.75 : x
  2. Step 2: Convert to fraction form
    1,282.15/1,766.95 = 1,123.75/x
  3. Step 3: Cross multiply
    1,282.15x = 1,766.95 × 1,123.75
  4. Step 4: Simplify right side
    1,282.15x = 1,985,610.06
  5. Step 5: Solve for x
    x = 1,985,610.06/1,282.15
  6. Step 6: Final answer
    x = 1,548.66

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1.5x scale

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.