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Finding the Fourth Proportional to 518, 772.98 and 448.88

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Solution

The fourth proportional to 518, 772.98 and 448.88 is: 669.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    518 : 772.98 = 448.88 : x
  2. Step 2: Convert to fraction form
    518/772.98 = 448.88/x
  3. Step 3: Cross multiply
    518x = 772.98 × 448.88
  4. Step 4: Simplify right side
    518x = 346,975.26
  5. Step 5: Solve for x
    x = 346,975.26/518
  6. Step 6: Final answer
    x = 669.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.