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Finding the Fourth Proportional to 355.65, 531.03 and 316.68

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Solution

The fourth proportional to 355.65, 531.03 and 316.68 is: 472.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.65 : 531.03 = 316.68 : x
  2. Step 2: Convert to fraction form
    355.65/531.03 = 316.68/x
  3. Step 3: Cross multiply
    355.65x = 531.03 × 316.68
  4. Step 4: Simplify right side
    355.65x = 168,166.58
  5. Step 5: Solve for x
    x = 168,166.58/355.65
  6. Step 6: Final answer
    x = 472.84

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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.