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Finding the Fourth Proportional to 328.74, 492.99 and 146.00

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Solution

The fourth proportional to 328.74, 492.99 and 146.00 is: 218.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.74 : 492.99 = 146.00 : x
  2. Step 2: Convert to fraction form
    328.74/492.99 = 146.00/x
  3. Step 3: Cross multiply
    328.74x = 492.99 × 146.00
  4. Step 4: Simplify right side
    328.74x = 71,977.22
  5. Step 5: Solve for x
    x = 71,977.22/328.74
  6. Step 6: Final answer
    x = 218.95

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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.