Home / 1,269.45-1,904.13-391.95

Finding the Fourth Proportional to 1,269.45, 1,904.13 and 391.95

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Solution

The fourth proportional to 1,269.45, 1,904.13 and 391.95 is: 587.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.45 : 1,904.13 = 391.95 : x
  2. Step 2: Convert to fraction form
    1,269.45/1,904.13 = 391.95/x
  3. Step 3: Cross multiply
    1,269.45x = 1,904.13 × 391.95
  4. Step 4: Simplify right side
    1,269.45x = 746,323.75
  5. Step 5: Solve for x
    x = 746,323.75/1,269.45
  6. Step 6: Final answer
    x = 587.91

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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.