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Finding the Fourth Proportional to 1,067.62, 1,600.86 and 490

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Solution

The fourth proportional to 1,067.62, 1,600.86 and 490 is: 734.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.62 : 1,600.86 = 490 : x
  2. Step 2: Convert to fraction form
    1,067.62/1,600.86 = 490/x
  3. Step 3: Cross multiply
    1,067.62x = 1,600.86 × 490
  4. Step 4: Simplify right side
    1,067.62x = 784,421.40
  5. Step 5: Solve for x
    x = 784,421.40/1,067.62
  6. Step 6: Final answer
    x = 734.74

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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.