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Finding the Fourth Proportional to 264.79, 397.86 and 253.99

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Solution

The fourth proportional to 264.79, 397.86 and 253.99 is: 381.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.79 : 397.86 = 253.99 : x
  2. Step 2: Convert to fraction form
    264.79/397.86 = 253.99/x
  3. Step 3: Cross multiply
    264.79x = 397.86 × 253.99
  4. Step 4: Simplify right side
    264.79x = 101,052.46
  5. Step 5: Solve for x
    x = 101,052.46/264.79
  6. Step 6: Final answer
    x = 381.63

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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.