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Finding the Fourth Proportional to 336.20, 504.90 and 259.35

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Solution

The fourth proportional to 336.20, 504.90 and 259.35 is: 389.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.20 : 504.90 = 259.35 : x
  2. Step 2: Convert to fraction form
    336.20/504.90 = 259.35/x
  3. Step 3: Cross multiply
    336.20x = 504.90 × 259.35
  4. Step 4: Simplify right side
    336.20x = 130,943.92
  5. Step 5: Solve for x
    x = 130,943.92/336.20
  6. Step 6: Final answer
    x = 389.49

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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.