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Finding the Fourth Proportional to 2,702.68, 4,053.81 and 853.85

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Solution

The fourth proportional to 2,702.68, 4,053.81 and 853.85 is: 1,280.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,702.68 : 4,053.81 = 853.85 : x
  2. Step 2: Convert to fraction form
    2,702.68/4,053.81 = 853.85/x
  3. Step 3: Cross multiply
    2,702.68x = 4,053.81 × 853.85
  4. Step 4: Simplify right side
    2,702.68x = 3,461,345.67
  5. Step 5: Solve for x
    x = 3,461,345.67/2,702.68
  6. Step 6: Final answer
    x = 1,280.71

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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.