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Finding the Fourth Proportional to 620.69, 934.63 and 448.53

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Solution

The fourth proportional to 620.69, 934.63 and 448.53 is: 675.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.69 : 934.63 = 448.53 : x
  2. Step 2: Convert to fraction form
    620.69/934.63 = 448.53/x
  3. Step 3: Cross multiply
    620.69x = 934.63 × 448.53
  4. Step 4: Simplify right side
    620.69x = 419,209.59
  5. Step 5: Solve for x
    x = 419,209.59/620.69
  6. Step 6: Final answer
    x = 675.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.