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Finding the Fourth Proportional to 454, 679.59 and 316.36

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Solution

The fourth proportional to 454, 679.59 and 316.36 is: 473.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    454 : 679.59 = 316.36 : x
  2. Step 2: Convert to fraction form
    454/679.59 = 316.36/x
  3. Step 3: Cross multiply
    454x = 679.59 × 316.36
  4. Step 4: Simplify right side
    454x = 214,995.09
  5. Step 5: Solve for x
    x = 214,995.09/454
  6. Step 6: Final answer
    x = 473.56

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