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Finding the Fourth Proportional to 506.70, 699.17 and 307.67

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Solution

The fourth proportional to 506.70, 699.17 and 307.67 is: 424.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.70 : 699.17 = 307.67 : x
  2. Step 2: Convert to fraction form
    506.70/699.17 = 307.67/x
  3. Step 3: Cross multiply
    506.70x = 699.17 × 307.67
  4. Step 4: Simplify right side
    506.70x = 215,108.60
  5. Step 5: Solve for x
    x = 215,108.60/506.70
  6. Step 6: Final answer
    x = 424.53

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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.