Home / 1,100.16-1,650.36-515.12

Finding the Fourth Proportional to 1,100.16, 1,650.36 and 515.12

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Solution

The fourth proportional to 1,100.16, 1,650.36 and 515.12 is: 772.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.16 : 1,650.36 = 515.12 : x
  2. Step 2: Convert to fraction form
    1,100.16/1,650.36 = 515.12/x
  3. Step 3: Cross multiply
    1,100.16x = 1,650.36 × 515.12
  4. Step 4: Simplify right side
    1,100.16x = 850,133.44
  5. Step 5: Solve for x
    x = 850,133.44/1,100.16
  6. Step 6: Final answer
    x = 772.74

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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.