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Finding the Fourth Proportional to 549.96, 828.81 and 515.36

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Solution

The fourth proportional to 549.96, 828.81 and 515.36 is: 776.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.96 : 828.81 = 515.36 : x
  2. Step 2: Convert to fraction form
    549.96/828.81 = 515.36/x
  3. Step 3: Cross multiply
    549.96x = 828.81 × 515.36
  4. Step 4: Simplify right side
    549.96x = 427,136.14
  5. Step 5: Solve for x
    x = 427,136.14/549.96
  6. Step 6: Final answer
    x = 776.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.