Home / 1,120.02-1,689.03-1,112.73

Finding the Fourth Proportional to 1,120.02, 1,689.03 and 1,112.73

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Solution

The fourth proportional to 1,120.02, 1,689.03 and 1,112.73 is: 1,678.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.02 : 1,689.03 = 1,112.73 : x
  2. Step 2: Convert to fraction form
    1,120.02/1,689.03 = 1,112.73/x
  3. Step 3: Cross multiply
    1,120.02x = 1,689.03 × 1,112.73
  4. Step 4: Simplify right side
    1,120.02x = 1,879,434.35
  5. Step 5: Solve for x
    x = 1,879,434.35/1,120.02
  6. Step 6: Final answer
    x = 1,678.04

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.