Home / 1,161.87-1,742.40-512.25

Finding the Fourth Proportional to 1,161.87, 1,742.40 and 512.25

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Solution

The fourth proportional to 1,161.87, 1,742.40 and 512.25 is: 768.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.87 : 1,742.40 = 512.25 : x
  2. Step 2: Convert to fraction form
    1,161.87/1,742.40 = 512.25/x
  3. Step 3: Cross multiply
    1,161.87x = 1,742.40 × 512.25
  4. Step 4: Simplify right side
    1,161.87x = 892,544.40
  5. Step 5: Solve for x
    x = 892,544.40/1,161.87
  6. Step 6: Final answer
    x = 768.20

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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.