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Finding the Fourth Proportional to 265.79, 399.36 and 254.99

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Solution

The fourth proportional to 265.79, 399.36 and 254.99 is: 383.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.79 : 399.36 = 254.99 : x
  2. Step 2: Convert to fraction form
    265.79/399.36 = 254.99/x
  3. Step 3: Cross multiply
    265.79x = 399.36 × 254.99
  4. Step 4: Simplify right side
    265.79x = 101,832.81
  5. Step 5: Solve for x
    x = 101,832.81/265.79
  6. Step 6: Final answer
    x = 383.13

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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.