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Finding the Fourth Proportional to 1,396.66, 2,095.98 and 616.85

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Solution

The fourth proportional to 1,396.66, 2,095.98 and 616.85 is: 925.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.66 : 2,095.98 = 616.85 : x
  2. Step 2: Convert to fraction form
    1,396.66/2,095.98 = 616.85/x
  3. Step 3: Cross multiply
    1,396.66x = 2,095.98 × 616.85
  4. Step 4: Simplify right side
    1,396.66x = 1,292,905.26
  5. Step 5: Solve for x
    x = 1,292,905.26/1,396.66
  6. Step 6: Final answer
    x = 925.71

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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.