Home / 1,287.14-1,931.07-556.22

Finding the Fourth Proportional to 1,287.14, 1,931.07 and 556.22

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Solution

The fourth proportional to 1,287.14, 1,931.07 and 556.22 is: 834.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.14 : 1,931.07 = 556.22 : x
  2. Step 2: Convert to fraction form
    1,287.14/1,931.07 = 556.22/x
  3. Step 3: Cross multiply
    1,287.14x = 1,931.07 × 556.22
  4. Step 4: Simplify right side
    1,287.14x = 1,074,099.76
  5. Step 5: Solve for x
    x = 1,074,099.76/1,287.14
  6. Step 6: Final answer
    x = 834.49

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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.