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Finding the Fourth Proportional to 930.53, 1,395.86 and 382.56

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Solution

The fourth proportional to 930.53, 1,395.86 and 382.56 is: 573.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.53 : 1,395.86 = 382.56 : x
  2. Step 2: Convert to fraction form
    930.53/1,395.86 = 382.56/x
  3. Step 3: Cross multiply
    930.53x = 1,395.86 × 382.56
  4. Step 4: Simplify right side
    930.53x = 533,998.29
  5. Step 5: Solve for x
    x = 533,998.29/930.53
  6. Step 6: Final answer
    x = 573.87

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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.