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Finding the Fourth Proportional to 450.16, 621.20 and 253.69

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Solution

The fourth proportional to 450.16, 621.20 and 253.69 is: 350.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.16 : 621.20 = 253.69 : x
  2. Step 2: Convert to fraction form
    450.16/621.20 = 253.69/x
  3. Step 3: Cross multiply
    450.16x = 621.20 × 253.69
  4. Step 4: Simplify right side
    450.16x = 157,591.31
  5. Step 5: Solve for x
    x = 157,591.31/450.16
  6. Step 6: Final answer
    x = 350.08

Related Problems

Find fourth proportional to 225.08, 310.60 and 126.84
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Double scale
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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.