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Finding the Fourth Proportional to 338.47, 507.63 and 155.82

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Solution

The fourth proportional to 338.47, 507.63 and 155.82 is: 233.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.47 : 507.63 = 155.82 : x
  2. Step 2: Convert to fraction form
    338.47/507.63 = 155.82/x
  3. Step 3: Cross multiply
    338.47x = 507.63 × 155.82
  4. Step 4: Simplify right side
    338.47x = 79,098.91
  5. Step 5: Solve for x
    x = 79,098.91/338.47
  6. Step 6: Final answer
    x = 233.70

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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.