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Finding the Fourth Proportional to 450.77, 620.66 and 357.21

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Solution

The fourth proportional to 450.77, 620.66 and 357.21 is: 491.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.77 : 620.66 = 357.21 : x
  2. Step 2: Convert to fraction form
    450.77/620.66 = 357.21/x
  3. Step 3: Cross multiply
    450.77x = 620.66 × 357.21
  4. Step 4: Simplify right side
    450.77x = 221,706.85
  5. Step 5: Solve for x
    x = 221,706.85/450.77
  6. Step 6: Final answer
    x = 491.85

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Find fourth proportional to 225.38, 310.33 and 178.61
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.