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Finding the Fourth Proportional to 456.69, 630.84 and 316.56

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Solution

The fourth proportional to 456.69, 630.84 and 316.56 is: 437.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.69 : 630.84 = 316.56 : x
  2. Step 2: Convert to fraction form
    456.69/630.84 = 316.56/x
  3. Step 3: Cross multiply
    456.69x = 630.84 × 316.56
  4. Step 4: Simplify right side
    456.69x = 199,698.71
  5. Step 5: Solve for x
    x = 199,698.71/456.69
  6. Step 6: Final answer
    x = 437.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.