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Finding the Fourth Proportional to 822.51, 1,233.84 and 411.38

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Solution

The fourth proportional to 822.51, 1,233.84 and 411.38 is: 617.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.51 : 1,233.84 = 411.38 : x
  2. Step 2: Convert to fraction form
    822.51/1,233.84 = 411.38/x
  3. Step 3: Cross multiply
    822.51x = 1,233.84 × 411.38
  4. Step 4: Simplify right side
    822.51x = 507,577.10
  5. Step 5: Solve for x
    x = 507,577.10/822.51
  6. Step 6: Final answer
    x = 617.11

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.