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Finding the Fourth Proportional to 576.99, 860.49 and 549.45

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Solution

The fourth proportional to 576.99, 860.49 and 549.45 is: 819.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.99 : 860.49 = 549.45 : x
  2. Step 2: Convert to fraction form
    576.99/860.49 = 549.45/x
  3. Step 3: Cross multiply
    576.99x = 860.49 × 549.45
  4. Step 4: Simplify right side
    576.99x = 472,796.23
  5. Step 5: Solve for x
    x = 472,796.23/576.99
  6. Step 6: Final answer
    x = 819.42

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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.