Home / 1,917.02-2,874.09-991.34

Finding the Fourth Proportional to 1,917.02, 2,874.09 and 991.34

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Solution

The fourth proportional to 1,917.02, 2,874.09 and 991.34 is: 1,486.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.02 : 2,874.09 = 991.34 : x
  2. Step 2: Convert to fraction form
    1,917.02/2,874.09 = 991.34/x
  3. Step 3: Cross multiply
    1,917.02x = 2,874.09 × 991.34
  4. Step 4: Simplify right side
    1,917.02x = 2,849,200.38
  5. Step 5: Solve for x
    x = 2,849,200.38/1,917.02
  6. Step 6: Final answer
    x = 1,486.27

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1.5x scale

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.