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Finding the Fourth Proportional to 549.02, 757.47 and 312.94

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Solution

The fourth proportional to 549.02, 757.47 and 312.94 is: 431.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.02 : 757.47 = 312.94 : x
  2. Step 2: Convert to fraction form
    549.02/757.47 = 312.94/x
  3. Step 3: Cross multiply
    549.02x = 757.47 × 312.94
  4. Step 4: Simplify right side
    549.02x = 237,042.66
  5. Step 5: Solve for x
    x = 237,042.66/549.02
  6. Step 6: Final answer
    x = 431.76

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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.