Home / 1,261.90-1,739.66-1,102.74

Finding the Fourth Proportional to 1,261.90, 1,739.66 and 1,102.74

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Solution

The fourth proportional to 1,261.90, 1,739.66 and 1,102.74 is: 1,520.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.90 : 1,739.66 = 1,102.74 : x
  2. Step 2: Convert to fraction form
    1,261.90/1,739.66 = 1,102.74/x
  3. Step 3: Cross multiply
    1,261.90x = 1,739.66 × 1,102.74
  4. Step 4: Simplify right side
    1,261.90x = 1,918,392.67
  5. Step 5: Solve for x
    x = 1,918,392.67/1,261.90
  6. Step 6: Final answer
    x = 1,520.24

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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.