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Finding the Fourth Proportional to 384.96, 530.28 and 306.54

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Solution

The fourth proportional to 384.96, 530.28 and 306.54 is: 422.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.96 : 530.28 = 306.54 : x
  2. Step 2: Convert to fraction form
    384.96/530.28 = 306.54/x
  3. Step 3: Cross multiply
    384.96x = 530.28 × 306.54
  4. Step 4: Simplify right side
    384.96x = 162,552.03
  5. Step 5: Solve for x
    x = 162,552.03/384.96
  6. Step 6: Final answer
    x = 422.26

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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.