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Finding the Fourth Proportional to 531.78, 796.02 and 287.70

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Solution

The fourth proportional to 531.78, 796.02 and 287.70 is: 430.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.78 : 796.02 = 287.70 : x
  2. Step 2: Convert to fraction form
    531.78/796.02 = 287.70/x
  3. Step 3: Cross multiply
    531.78x = 796.02 × 287.70
  4. Step 4: Simplify right side
    531.78x = 229,014.95
  5. Step 5: Solve for x
    x = 229,014.95/531.78
  6. Step 6: Final answer
    x = 430.66

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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.