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Finding the Fourth Proportional to 354.87, 531.56 and 313.88

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Solution

The fourth proportional to 354.87, 531.56 and 313.88 is: 470.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.87 : 531.56 = 313.88 : x
  2. Step 2: Convert to fraction form
    354.87/531.56 = 313.88/x
  3. Step 3: Cross multiply
    354.87x = 531.56 × 313.88
  4. Step 4: Simplify right side
    354.87x = 166,841.83
  5. Step 5: Solve for x
    x = 166,841.83/354.87
  6. Step 6: Final answer
    x = 470.15

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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.