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Finding the Fourth Proportional to 253.34, 379.94 and 90.98

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Solution

The fourth proportional to 253.34, 379.94 and 90.98 is: 136.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.34 : 379.94 = 90.98 : x
  2. Step 2: Convert to fraction form
    253.34/379.94 = 90.98/x
  3. Step 3: Cross multiply
    253.34x = 379.94 × 90.98
  4. Step 4: Simplify right side
    253.34x = 34,566.94
  5. Step 5: Solve for x
    x = 34,566.94/253.34
  6. Step 6: Final answer
    x = 136.44

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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.