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Finding the Fourth Proportional to 665.13, 997.33 and 434.10

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Solution

The fourth proportional to 665.13, 997.33 and 434.10 is: 650.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.13 : 997.33 = 434.10 : x
  2. Step 2: Convert to fraction form
    665.13/997.33 = 434.10/x
  3. Step 3: Cross multiply
    665.13x = 997.33 × 434.10
  4. Step 4: Simplify right side
    665.13x = 432,940.95
  5. Step 5: Solve for x
    x = 432,940.95/665.13
  6. Step 6: Final answer
    x = 650.91

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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.