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Finding the Fourth Proportional to 1,339.36, 2,009.34 and 414.95

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Solution

The fourth proportional to 1,339.36, 2,009.34 and 414.95 is: 622.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.36 : 2,009.34 = 414.95 : x
  2. Step 2: Convert to fraction form
    1,339.36/2,009.34 = 414.95/x
  3. Step 3: Cross multiply
    1,339.36x = 2,009.34 × 414.95
  4. Step 4: Simplify right side
    1,339.36x = 833,765.59
  5. Step 5: Solve for x
    x = 833,765.59/1,339.36
  6. Step 6: Final answer
    x = 622.51

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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.