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Finding the Fourth Proportional to 338.07, 507.28 and 155.51

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Solution

The fourth proportional to 338.07, 507.28 and 155.51 is: 233.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.07 : 507.28 = 155.51 : x
  2. Step 2: Convert to fraction form
    338.07/507.28 = 155.51/x
  3. Step 3: Cross multiply
    338.07x = 507.28 × 155.51
  4. Step 4: Simplify right side
    338.07x = 78,887.11
  5. Step 5: Solve for x
    x = 78,887.11/338.07
  6. Step 6: Final answer
    x = 233.35

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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.