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Finding the Fourth Proportional to 450.75, 622.14 and 276.20

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Solution

The fourth proportional to 450.75, 622.14 and 276.20 is: 381.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.75 : 622.14 = 276.20 : x
  2. Step 2: Convert to fraction form
    450.75/622.14 = 276.20/x
  3. Step 3: Cross multiply
    450.75x = 622.14 × 276.20
  4. Step 4: Simplify right side
    450.75x = 171,831.96
  5. Step 5: Solve for x
    x = 171,831.96/450.75
  6. Step 6: Final answer
    x = 381.21

Related Problems

Find fourth proportional to 225.38, 311.07 and 138.10
Half scale
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Double scale
Find fourth proportional to 451.75, 623.52 and 277.20
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.