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Finding the Fourth Proportional to 608.70, 913.12 and 316.34

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Solution

The fourth proportional to 608.70, 913.12 and 316.34 is: 474.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.70 : 913.12 = 316.34 : x
  2. Step 2: Convert to fraction form
    608.70/913.12 = 316.34/x
  3. Step 3: Cross multiply
    608.70x = 913.12 × 316.34
  4. Step 4: Simplify right side
    608.70x = 288,851.82
  5. Step 5: Solve for x
    x = 288,851.82/608.70
  6. Step 6: Final answer
    x = 474.54

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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.