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Finding the Fourth Proportional to 318.83, 475.51 and 313.36

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Solution

The fourth proportional to 318.83, 475.51 and 313.36 is: 467.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.83 : 475.51 = 313.36 : x
  2. Step 2: Convert to fraction form
    318.83/475.51 = 313.36/x
  3. Step 3: Cross multiply
    318.83x = 475.51 × 313.36
  4. Step 4: Simplify right side
    318.83x = 149,006.22
  5. Step 5: Solve for x
    x = 149,006.22/318.83
  6. Step 6: Final answer
    x = 467.35

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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.