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Finding the Fourth Proportional to 544.80, 813 and 448.80

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Solution

The fourth proportional to 544.80, 813 and 448.80 is: 669.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.80 : 813 = 448.80 : x
  2. Step 2: Convert to fraction form
    544.80/813 = 448.80/x
  3. Step 3: Cross multiply
    544.80x = 813 × 448.80
  4. Step 4: Simplify right side
    544.80x = 364,874.40
  5. Step 5: Solve for x
    x = 364,874.40/544.80
  6. Step 6: Final answer
    x = 669.74

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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.