Home / 1,261.69-1,738.60-1,042.18

Finding the Fourth Proportional to 1,261.69, 1,738.60 and 1,042.18

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Solution

The fourth proportional to 1,261.69, 1,738.60 and 1,042.18 is: 1,436.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.69 : 1,738.60 = 1,042.18 : x
  2. Step 2: Convert to fraction form
    1,261.69/1,738.60 = 1,042.18/x
  3. Step 3: Cross multiply
    1,261.69x = 1,738.60 × 1,042.18
  4. Step 4: Simplify right side
    1,261.69x = 1,811,934.15
  5. Step 5: Solve for x
    x = 1,811,934.15/1,261.69
  6. Step 6: Final answer
    x = 1,436.12

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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.