Home / 1,287.10-1,927.26-636.13

Finding the Fourth Proportional to 1,287.10, 1,927.26 and 636.13

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Solution

The fourth proportional to 1,287.10, 1,927.26 and 636.13 is: 952.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.10 : 1,927.26 = 636.13 : x
  2. Step 2: Convert to fraction form
    1,287.10/1,927.26 = 636.13/x
  3. Step 3: Cross multiply
    1,287.10x = 1,927.26 × 636.13
  4. Step 4: Simplify right side
    1,287.10x = 1,225,987.90
  5. Step 5: Solve for x
    x = 1,225,987.90/1,287.10
  6. Step 6: Final answer
    x = 952.52

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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.