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Finding the Fourth Proportional to 458.99, 688.49 and 134.36

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Solution

The fourth proportional to 458.99, 688.49 and 134.36 is: 201.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.99 : 688.49 = 134.36 : x
  2. Step 2: Convert to fraction form
    458.99/688.49 = 134.36/x
  3. Step 3: Cross multiply
    458.99x = 688.49 × 134.36
  4. Step 4: Simplify right side
    458.99x = 92,501.40
  5. Step 5: Solve for x
    x = 92,501.40/458.99
  6. Step 6: Final answer
    x = 201.53

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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.