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Finding the Fourth Proportional to 358.18, 539.53 and 320.11

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Solution

The fourth proportional to 358.18, 539.53 and 320.11 is: 482.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.18 : 539.53 = 320.11 : x
  2. Step 2: Convert to fraction form
    358.18/539.53 = 320.11/x
  3. Step 3: Cross multiply
    358.18x = 539.53 × 320.11
  4. Step 4: Simplify right side
    358.18x = 172,706.80
  5. Step 5: Solve for x
    x = 172,706.80/358.18
  6. Step 6: Final answer
    x = 482.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.