Home / 1,261.11-1,740.36-693.98

Finding the Fourth Proportional to 1,261.11, 1,740.36 and 693.98

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Solution

The fourth proportional to 1,261.11, 1,740.36 and 693.98 is: 957.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.11 : 1,740.36 = 693.98 : x
  2. Step 2: Convert to fraction form
    1,261.11/1,740.36 = 693.98/x
  3. Step 3: Cross multiply
    1,261.11x = 1,740.36 × 693.98
  4. Step 4: Simplify right side
    1,261.11x = 1,207,766.33
  5. Step 5: Solve for x
    x = 1,207,766.33/1,261.11
  6. Step 6: Final answer
    x = 957.70

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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.