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Finding the Fourth Proportional to 663.09, 915.00 and 383.33

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Solution

The fourth proportional to 663.09, 915.00 and 383.33 is: 528.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.09 : 915.00 = 383.33 : x
  2. Step 2: Convert to fraction form
    663.09/915.00 = 383.33/x
  3. Step 3: Cross multiply
    663.09x = 915.00 × 383.33
  4. Step 4: Simplify right side
    663.09x = 350,747.80
  5. Step 5: Solve for x
    x = 350,747.80/663.09
  6. Step 6: Final answer
    x = 528.96

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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.