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Finding the Fourth Proportional to 338.40, 507.68 and 176.16

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Solution

The fourth proportional to 338.40, 507.68 and 176.16 is: 264.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.40 : 507.68 = 176.16 : x
  2. Step 2: Convert to fraction form
    338.40/507.68 = 176.16/x
  3. Step 3: Cross multiply
    338.40x = 507.68 × 176.16
  4. Step 4: Simplify right side
    338.40x = 89,432.91
  5. Step 5: Solve for x
    x = 89,432.91/338.40
  6. Step 6: Final answer
    x = 264.28

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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.