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Finding the Fourth Proportional to 549.06, 823.12 and 256.41

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Solution

The fourth proportional to 549.06, 823.12 and 256.41 is: 384.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.06 : 823.12 = 256.41 : x
  2. Step 2: Convert to fraction form
    549.06/823.12 = 256.41/x
  3. Step 3: Cross multiply
    549.06x = 823.12 × 256.41
  4. Step 4: Simplify right side
    549.06x = 211,056.20
  5. Step 5: Solve for x
    x = 211,056.20/549.06
  6. Step 6: Final answer
    x = 384.40

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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.