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Finding the Fourth Proportional to 638.42, 957.53 and 227.50

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Solution

The fourth proportional to 638.42, 957.53 and 227.50 is: 341.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.42 : 957.53 = 227.50 : x
  2. Step 2: Convert to fraction form
    638.42/957.53 = 227.50/x
  3. Step 3: Cross multiply
    638.42x = 957.53 × 227.50
  4. Step 4: Simplify right side
    638.42x = 217,832.15
  5. Step 5: Solve for x
    x = 217,832.15/638.42
  6. Step 6: Final answer
    x = 341.21

Related Problems

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Half scale
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Double scale
Find fourth proportional to 639.42, 959.02 and 228.50
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.