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Finding the Fourth Proportional to 930.31, 1,395.68 and 353.19

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Solution

The fourth proportional to 930.31, 1,395.68 and 353.19 is: 529.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.31 : 1,395.68 = 353.19 : x
  2. Step 2: Convert to fraction form
    930.31/1,395.68 = 353.19/x
  3. Step 3: Cross multiply
    930.31x = 1,395.68 × 353.19
  4. Step 4: Simplify right side
    930.31x = 492,940.22
  5. Step 5: Solve for x
    x = 492,940.22/930.31
  6. Step 6: Final answer
    x = 529.87

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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.