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Finding the Fourth Proportional to 355.36, 530.20 and 316.38

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Solution

The fourth proportional to 355.36, 530.20 and 316.38 is: 472.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.36 : 530.20 = 316.38 : x
  2. Step 2: Convert to fraction form
    355.36/530.20 = 316.38/x
  3. Step 3: Cross multiply
    355.36x = 530.20 × 316.38
  4. Step 4: Simplify right side
    355.36x = 167,744.68
  5. Step 5: Solve for x
    x = 167,744.68/355.36
  6. Step 6: Final answer
    x = 472.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.