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Finding the Fourth Proportional to 822.96, 1,233.55 and 411.28

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Solution

The fourth proportional to 822.96, 1,233.55 and 411.28 is: 616.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.96 : 1,233.55 = 411.28 : x
  2. Step 2: Convert to fraction form
    822.96/1,233.55 = 411.28/x
  3. Step 3: Cross multiply
    822.96x = 1,233.55 × 411.28
  4. Step 4: Simplify right side
    822.96x = 507,334.44
  5. Step 5: Solve for x
    x = 507,334.44/822.96
  6. Step 6: Final answer
    x = 616.48

Related Problems

Find fourth proportional to 411.48, 616.78 and 205.64
Half scale
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Double scale
Find fourth proportional to 823.96, 1,235.05 and 412.28
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.