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Finding the Fourth Proportional to 336.69, 504.93 and 128.40

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Solution

The fourth proportional to 336.69, 504.93 and 128.40 is: 192.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.69 : 504.93 = 128.40 : x
  2. Step 2: Convert to fraction form
    336.69/504.93 = 128.40/x
  3. Step 3: Cross multiply
    336.69x = 504.93 × 128.40
  4. Step 4: Simplify right side
    336.69x = 64,833.01
  5. Step 5: Solve for x
    x = 64,833.01/336.69
  6. Step 6: Final answer
    x = 192.56

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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.