Home / 1,561.11-2,154.45-931.83

Finding the Fourth Proportional to 1,561.11, 2,154.45 and 931.83

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Solution

The fourth proportional to 1,561.11, 2,154.45 and 931.83 is: 1,286.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.11 : 2,154.45 = 931.83 : x
  2. Step 2: Convert to fraction form
    1,561.11/2,154.45 = 931.83/x
  3. Step 3: Cross multiply
    1,561.11x = 2,154.45 × 931.83
  4. Step 4: Simplify right side
    1,561.11x = 2,007,581.14
  5. Step 5: Solve for x
    x = 2,007,581.14/1,561.11
  6. Step 6: Final answer
    x = 1,286.00

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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.