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Finding the Fourth Proportional to 1,261.07, 1,891.31 and 798.24

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Solution

The fourth proportional to 1,261.07, 1,891.31 and 798.24 is: 1,197.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.07 : 1,891.31 = 798.24 : x
  2. Step 2: Convert to fraction form
    1,261.07/1,891.31 = 798.24/x
  3. Step 3: Cross multiply
    1,261.07x = 1,891.31 × 798.24
  4. Step 4: Simplify right side
    1,261.07x = 1,509,719.29
  5. Step 5: Solve for x
    x = 1,509,719.29/1,261.07
  6. Step 6: Final answer
    x = 1,197.17

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1.5x scale

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.