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Finding the Fourth Proportional to 384.25, 575.40 and 253.86

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Solution

The fourth proportional to 384.25, 575.40 and 253.86 is: 380.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.25 : 575.40 = 253.86 : x
  2. Step 2: Convert to fraction form
    384.25/575.40 = 253.86/x
  3. Step 3: Cross multiply
    384.25x = 575.40 × 253.86
  4. Step 4: Simplify right side
    384.25x = 146,071.04
  5. Step 5: Solve for x
    x = 146,071.04/384.25
  6. Step 6: Final answer
    x = 380.15

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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.