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Finding the Fourth Proportional to 357.70, 536.55 and 316.66

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Solution

The fourth proportional to 357.70, 536.55 and 316.66 is: 474.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.70 : 536.55 = 316.66 : x
  2. Step 2: Convert to fraction form
    357.70/536.55 = 316.66/x
  3. Step 3: Cross multiply
    357.70x = 536.55 × 316.66
  4. Step 4: Simplify right side
    357.70x = 169,903.92
  5. Step 5: Solve for x
    x = 169,903.92/357.70
  6. Step 6: Final answer
    x = 474.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.