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Finding the Fourth Proportional to 1,339.77, 2,007.21 and 1,310.61

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Solution

The fourth proportional to 1,339.77, 2,007.21 and 1,310.61 is: 1,963.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.77 : 2,007.21 = 1,310.61 : x
  2. Step 2: Convert to fraction form
    1,339.77/2,007.21 = 1,310.61/x
  3. Step 3: Cross multiply
    1,339.77x = 2,007.21 × 1,310.61
  4. Step 4: Simplify right side
    1,339.77x = 2,630,669.50
  5. Step 5: Solve for x
    x = 2,630,669.50/1,339.77
  6. Step 6: Final answer
    x = 1,963.52

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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.