Home / 1,126.02-1,698.09-1,118.73

Finding the Fourth Proportional to 1,126.02, 1,698.09 and 1,118.73

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Solution

The fourth proportional to 1,126.02, 1,698.09 and 1,118.73 is: 1,687.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.02 : 1,698.09 = 1,118.73 : x
  2. Step 2: Convert to fraction form
    1,126.02/1,698.09 = 1,118.73/x
  3. Step 3: Cross multiply
    1,126.02x = 1,698.09 × 1,118.73
  4. Step 4: Simplify right side
    1,126.02x = 1,899,704.23
  5. Step 5: Solve for x
    x = 1,899,704.23/1,126.02
  6. Step 6: Final answer
    x = 1,687.10

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1.5x scale

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.