Home / 1,921.13-2,651.02-1,174.78

Finding the Fourth Proportional to 1,921.13, 2,651.02 and 1,174.78

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Solution

The fourth proportional to 1,921.13, 2,651.02 and 1,174.78 is: 1,621.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.13 : 2,651.02 = 1,174.78 : x
  2. Step 2: Convert to fraction form
    1,921.13/2,651.02 = 1,174.78/x
  3. Step 3: Cross multiply
    1,921.13x = 2,651.02 × 1,174.78
  4. Step 4: Simplify right side
    1,921.13x = 3,114,355.71
  5. Step 5: Solve for x
    x = 3,114,355.71/1,921.13
  6. Step 6: Final answer
    x = 1,621.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.