Home / 1,291.25-1,936.89-317.35

Finding the Fourth Proportional to 1,291.25, 1,936.89 and 317.35

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Solution

The fourth proportional to 1,291.25, 1,936.89 and 317.35 is: 476.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.25 : 1,936.89 = 317.35 : x
  2. Step 2: Convert to fraction form
    1,291.25/1,936.89 = 317.35/x
  3. Step 3: Cross multiply
    1,291.25x = 1,936.89 × 317.35
  4. Step 4: Simplify right side
    1,291.25x = 614,672.04
  5. Step 5: Solve for x
    x = 614,672.04/1,291.25
  6. Step 6: Final answer
    x = 476.03

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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.