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Finding the Fourth Proportional to 1,340.32, 2,007.95 and 644.94

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Solution

The fourth proportional to 1,340.32, 2,007.95 and 644.94 is: 966.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.32 : 2,007.95 = 644.94 : x
  2. Step 2: Convert to fraction form
    1,340.32/2,007.95 = 644.94/x
  3. Step 3: Cross multiply
    1,340.32x = 2,007.95 × 644.94
  4. Step 4: Simplify right side
    1,340.32x = 1,295,007.27
  5. Step 5: Solve for x
    x = 1,295,007.27/1,340.32
  6. Step 6: Final answer
    x = 966.19

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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.