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Finding the Fourth Proportional to 505.87, 698.93 and 381.94

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Solution

The fourth proportional to 505.87, 698.93 and 381.94 is: 527.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.87 : 698.93 = 381.94 : x
  2. Step 2: Convert to fraction form
    505.87/698.93 = 381.94/x
  3. Step 3: Cross multiply
    505.87x = 698.93 × 381.94
  4. Step 4: Simplify right side
    505.87x = 266,947.41
  5. Step 5: Solve for x
    x = 266,947.41/505.87
  6. Step 6: Final answer
    x = 527.70

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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.