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Finding the Fourth Proportional to 335, 501.78 and 253.88

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Solution

The fourth proportional to 335, 501.78 and 253.88 is: 380.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    335 : 501.78 = 253.88 : x
  2. Step 2: Convert to fraction form
    335/501.78 = 253.88/x
  3. Step 3: Cross multiply
    335x = 501.78 × 253.88
  4. Step 4: Simplify right side
    335x = 127,391.91
  5. Step 5: Solve for x
    x = 127,391.91/335
  6. Step 6: Final answer
    x = 380.27

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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.