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Finding the Fourth Proportional to 1,646.36, 2,469.62 and 492

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Solution

The fourth proportional to 1,646.36, 2,469.62 and 492 is: 738.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.36 : 2,469.62 = 492 : x
  2. Step 2: Convert to fraction form
    1,646.36/2,469.62 = 492/x
  3. Step 3: Cross multiply
    1,646.36x = 2,469.62 × 492
  4. Step 4: Simplify right side
    1,646.36x = 1,215,053.04
  5. Step 5: Solve for x
    x = 1,215,053.04/1,646.36
  6. Step 6: Final answer
    x = 738.02

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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.