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Finding the Fourth Proportional to 505.92, 698.63 and 319.74

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Solution

The fourth proportional to 505.92, 698.63 and 319.74 is: 441.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.92 : 698.63 = 319.74 : x
  2. Step 2: Convert to fraction form
    505.92/698.63 = 319.74/x
  3. Step 3: Cross multiply
    505.92x = 698.63 × 319.74
  4. Step 4: Simplify right side
    505.92x = 223,378.36
  5. Step 5: Solve for x
    x = 223,378.36/505.92
  6. Step 6: Final answer
    x = 441.53

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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.