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Finding the Fourth Proportional to 389.96, 537.72 and 265.38

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Solution

The fourth proportional to 389.96, 537.72 and 265.38 is: 365.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.96 : 537.72 = 265.38 : x
  2. Step 2: Convert to fraction form
    389.96/537.72 = 265.38/x
  3. Step 3: Cross multiply
    389.96x = 537.72 × 265.38
  4. Step 4: Simplify right side
    389.96x = 142,700.13
  5. Step 5: Solve for x
    x = 142,700.13/389.96
  6. Step 6: Final answer
    x = 365.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.