Home / 1,681.14-2,519.52-858.72

Finding the Fourth Proportional to 1,681.14, 2,519.52 and 858.72

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Solution

The fourth proportional to 1,681.14, 2,519.52 and 858.72 is: 1,286.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.14 : 2,519.52 = 858.72 : x
  2. Step 2: Convert to fraction form
    1,681.14/2,519.52 = 858.72/x
  3. Step 3: Cross multiply
    1,681.14x = 2,519.52 × 858.72
  4. Step 4: Simplify right side
    1,681.14x = 2,163,562.21
  5. Step 5: Solve for x
    x = 2,163,562.21/1,681.14
  6. Step 6: Final answer
    x = 1,286.96

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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.