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Finding the Fourth Proportional to 1,375.71, 2,064.47 and 1,284.58

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Solution

The fourth proportional to 1,375.71, 2,064.47 and 1,284.58 is: 1,927.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.71 : 2,064.47 = 1,284.58 : x
  2. Step 2: Convert to fraction form
    1,375.71/2,064.47 = 1,284.58/x
  3. Step 3: Cross multiply
    1,375.71x = 2,064.47 × 1,284.58
  4. Step 4: Simplify right side
    1,375.71x = 2,651,976.87
  5. Step 5: Solve for x
    x = 2,651,976.87/1,375.71
  6. Step 6: Final answer
    x = 1,927.72

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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.