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Finding the Fourth Proportional to 549.51, 823.21 and 275.28

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Solution

The fourth proportional to 549.51, 823.21 and 275.28 is: 412.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.51 : 823.21 = 275.28 : x
  2. Step 2: Convert to fraction form
    549.51/823.21 = 275.28/x
  3. Step 3: Cross multiply
    549.51x = 823.21 × 275.28
  4. Step 4: Simplify right side
    549.51x = 226,613.25
  5. Step 5: Solve for x
    x = 226,613.25/549.51
  6. Step 6: Final answer
    x = 412.39

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.