Home / 1,681.26-2,520.75-858.85

Finding the Fourth Proportional to 1,681.26, 2,520.75 and 858.85

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Solution

The fourth proportional to 1,681.26, 2,520.75 and 858.85 is: 1,287.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.26 : 2,520.75 = 858.85 : x
  2. Step 2: Convert to fraction form
    1,681.26/2,520.75 = 858.85/x
  3. Step 3: Cross multiply
    1,681.26x = 2,520.75 × 858.85
  4. Step 4: Simplify right side
    1,681.26x = 2,164,949.99
  5. Step 5: Solve for x
    x = 2,164,949.99/1,681.26
  6. Step 6: Final answer
    x = 1,287.70

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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.