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Finding the Fourth Proportional to 822.40, 1,233.57 and 274.57

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Solution

The fourth proportional to 822.40, 1,233.57 and 274.57 is: 411.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.40 : 1,233.57 = 274.57 : x
  2. Step 2: Convert to fraction form
    822.40/1,233.57 = 274.57/x
  3. Step 3: Cross multiply
    822.40x = 1,233.57 × 274.57
  4. Step 4: Simplify right side
    822.40x = 338,701.31
  5. Step 5: Solve for x
    x = 338,701.31/822.40
  6. Step 6: Final answer
    x = 411.84

Related Problems

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Half scale
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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.