Home / 1,261.39-1,891.35-929.29

Finding the Fourth Proportional to 1,261.39, 1,891.35 and 929.29

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Solution

The fourth proportional to 1,261.39, 1,891.35 and 929.29 is: 1,393.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.39 : 1,891.35 = 929.29 : x
  2. Step 2: Convert to fraction form
    1,261.39/1,891.35 = 929.29/x
  3. Step 3: Cross multiply
    1,261.39x = 1,891.35 × 929.29
  4. Step 4: Simplify right side
    1,261.39x = 1,757,612.64
  5. Step 5: Solve for x
    x = 1,757,612.64/1,261.39
  6. Step 6: Final answer
    x = 1,393.39

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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.