Home / 1,261.13-1,740.36-730.09

Finding the Fourth Proportional to 1,261.13, 1,740.36 and 730.09

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Solution

The fourth proportional to 1,261.13, 1,740.36 and 730.09 is: 1,007.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.13 : 1,740.36 = 730.09 : x
  2. Step 2: Convert to fraction form
    1,261.13/1,740.36 = 730.09/x
  3. Step 3: Cross multiply
    1,261.13x = 1,740.36 × 730.09
  4. Step 4: Simplify right side
    1,261.13x = 1,270,619.43
  5. Step 5: Solve for x
    x = 1,270,619.43/1,261.13
  6. Step 6: Final answer
    x = 1,007.52

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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.