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Finding the Fourth Proportional to 357.36, 533.17 and 318.38

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Solution

The fourth proportional to 357.36, 533.17 and 318.38 is: 475.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.36 : 533.17 = 318.38 : x
  2. Step 2: Convert to fraction form
    357.36/533.17 = 318.38/x
  3. Step 3: Cross multiply
    357.36x = 533.17 × 318.38
  4. Step 4: Simplify right side
    357.36x = 169,750.66
  5. Step 5: Solve for x
    x = 169,750.66/357.36
  6. Step 6: Final answer
    x = 475.01

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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.