Home / 1,291.00-1,936.51-317.10

Finding the Fourth Proportional to 1,291.00, 1,936.51 and 317.10

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Solution

The fourth proportional to 1,291.00, 1,936.51 and 317.10 is: 475.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.00 : 1,936.51 = 317.10 : x
  2. Step 2: Convert to fraction form
    1,291.00/1,936.51 = 317.10/x
  3. Step 3: Cross multiply
    1,291.00x = 1,936.51 × 317.10
  4. Step 4: Simplify right side
    1,291.00x = 614,074.58
  5. Step 5: Solve for x
    x = 614,074.58/1,291.00
  6. Step 6: Final answer
    x = 475.66

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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.