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Finding the Fourth Proportional to 355.81, 534.53 and 253.35

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Solution

The fourth proportional to 355.81, 534.53 and 253.35 is: 380.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.81 : 534.53 = 253.35 : x
  2. Step 2: Convert to fraction form
    355.81/534.53 = 253.35/x
  3. Step 3: Cross multiply
    355.81x = 534.53 × 253.35
  4. Step 4: Simplify right side
    355.81x = 135,423.18
  5. Step 5: Solve for x
    x = 135,423.18/355.81
  6. Step 6: Final answer
    x = 380.61

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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.