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Finding the Fourth Proportional to 336.20, 503.63 and 258.18

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Solution

The fourth proportional to 336.20, 503.63 and 258.18 is: 386.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.20 : 503.63 = 258.18 : x
  2. Step 2: Convert to fraction form
    336.20/503.63 = 258.18/x
  3. Step 3: Cross multiply
    336.20x = 503.63 × 258.18
  4. Step 4: Simplify right side
    336.20x = 130,025.90
  5. Step 5: Solve for x
    x = 130,025.90/336.20
  6. Step 6: Final answer
    x = 386.76

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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.