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Finding the Fourth Proportional to 336.81, 504.21 and 328.53

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Solution

The fourth proportional to 336.81, 504.21 and 328.53 is: 491.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.81 : 504.21 = 328.53 : x
  2. Step 2: Convert to fraction form
    336.81/504.21 = 328.53/x
  3. Step 3: Cross multiply
    336.81x = 504.21 × 328.53
  4. Step 4: Simplify right side
    336.81x = 165,648.11
  5. Step 5: Solve for x
    x = 165,648.11/336.81
  6. Step 6: Final answer
    x = 491.81

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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.