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Finding the Fourth Proportional to 384.64, 530.85 and 253.92

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Solution

The fourth proportional to 384.64, 530.85 and 253.92 is: 350.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.64 : 530.85 = 253.92 : x
  2. Step 2: Convert to fraction form
    384.64/530.85 = 253.92/x
  3. Step 3: Cross multiply
    384.64x = 530.85 × 253.92
  4. Step 4: Simplify right side
    384.64x = 134,793.43
  5. Step 5: Solve for x
    x = 134,793.43/384.64
  6. Step 6: Final answer
    x = 350.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.