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Finding the Fourth Proportional to 628.61, 866.09 and 549.32

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Solution

The fourth proportional to 628.61, 866.09 and 549.32 is: 756.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.61 : 866.09 = 549.32 : x
  2. Step 2: Convert to fraction form
    628.61/866.09 = 549.32/x
  3. Step 3: Cross multiply
    628.61x = 866.09 × 549.32
  4. Step 4: Simplify right side
    628.61x = 475,757.60
  5. Step 5: Solve for x
    x = 475,757.60/628.61
  6. Step 6: Final answer
    x = 756.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.