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Finding the Fourth Proportional to 333.90, 500.70 and 102.78

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Solution

The fourth proportional to 333.90, 500.70 and 102.78 is: 154.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.90 : 500.70 = 102.78 : x
  2. Step 2: Convert to fraction form
    333.90/500.70 = 102.78/x
  3. Step 3: Cross multiply
    333.90x = 500.70 × 102.78
  4. Step 4: Simplify right side
    333.90x = 51,461.95
  5. Step 5: Solve for x
    x = 51,461.95/333.90
  6. Step 6: Final answer
    x = 154.12

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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.