Home / 1,287.43-1,931.15-363.09

Finding the Fourth Proportional to 1,287.43, 1,931.15 and 363.09

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Solution

The fourth proportional to 1,287.43, 1,931.15 and 363.09 is: 544.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.43 : 1,931.15 = 363.09 : x
  2. Step 2: Convert to fraction form
    1,287.43/1,931.15 = 363.09/x
  3. Step 3: Cross multiply
    1,287.43x = 1,931.15 × 363.09
  4. Step 4: Simplify right side
    1,287.43x = 701,181.25
  5. Step 5: Solve for x
    x = 701,181.25/1,287.43
  6. Step 6: Final answer
    x = 544.64

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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.