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Finding the Fourth Proportional to 385.36, 530.45 and 336.15

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Solution

The fourth proportional to 385.36, 530.45 and 336.15 is: 462.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.36 : 530.45 = 336.15 : x
  2. Step 2: Convert to fraction form
    385.36/530.45 = 336.15/x
  3. Step 3: Cross multiply
    385.36x = 530.45 × 336.15
  4. Step 4: Simplify right side
    385.36x = 178,310.28
  5. Step 5: Solve for x
    x = 178,310.28/385.36
  6. Step 6: Final answer
    x = 462.72

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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.