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Finding the Fourth Proportional to 450.76, 621.57 and 293.21

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Solution

The fourth proportional to 450.76, 621.57 and 293.21 is: 404.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.76 : 621.57 = 293.21 : x
  2. Step 2: Convert to fraction form
    450.76/621.57 = 293.21/x
  3. Step 3: Cross multiply
    450.76x = 621.57 × 293.21
  4. Step 4: Simplify right side
    450.76x = 182,250.54
  5. Step 5: Solve for x
    x = 182,250.54/450.76
  6. Step 6: Final answer
    x = 404.32

Related Problems

Find fourth proportional to 225.38, 310.79 and 146.61
Half scale
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Double scale
Find fourth proportional to 451.76, 622.95 and 294.21
Similar ratio
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1.5x scale

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.