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Finding the Fourth Proportional to 655.67, 905.07 and 434.70

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Solution

The fourth proportional to 655.67, 905.07 and 434.70 is: 600.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.67 : 905.07 = 434.70 : x
  2. Step 2: Convert to fraction form
    655.67/905.07 = 434.70/x
  3. Step 3: Cross multiply
    655.67x = 905.07 × 434.70
  4. Step 4: Simplify right side
    655.67x = 393,429.40
  5. Step 5: Solve for x
    x = 393,429.40/655.67
  6. Step 6: Final answer
    x = 600.04

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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.