Home / 1,431.04-2,146.56-661.36

Finding the Fourth Proportional to 1,431.04, 2,146.56 and 661.36

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Solution

The fourth proportional to 1,431.04, 2,146.56 and 661.36 is: 992.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.04 : 2,146.56 = 661.36 : x
  2. Step 2: Convert to fraction form
    1,431.04/2,146.56 = 661.36/x
  3. Step 3: Cross multiply
    1,431.04x = 2,146.56 × 661.36
  4. Step 4: Simplify right side
    1,431.04x = 1,419,648.92
  5. Step 5: Solve for x
    x = 1,419,648.92/1,431.04
  6. Step 6: Final answer
    x = 992.04

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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.