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Finding the Fourth Proportional to 384.38, 530.45 and 229.13

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Solution

The fourth proportional to 384.38, 530.45 and 229.13 is: 316.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.38 : 530.45 = 229.13 : x
  2. Step 2: Convert to fraction form
    384.38/530.45 = 229.13/x
  3. Step 3: Cross multiply
    384.38x = 530.45 × 229.13
  4. Step 4: Simplify right side
    384.38x = 121,538.21
  5. Step 5: Solve for x
    x = 121,538.21/384.38
  6. Step 6: Final answer
    x = 316.20

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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.