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Finding the Fourth Proportional to 511.26, 766.41 and 430.26

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Solution

The fourth proportional to 511.26, 766.41 and 430.26 is: 644.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.26 : 766.41 = 430.26 : x
  2. Step 2: Convert to fraction form
    511.26/766.41 = 430.26/x
  3. Step 3: Cross multiply
    511.26x = 766.41 × 430.26
  4. Step 4: Simplify right side
    511.26x = 329,755.57
  5. Step 5: Solve for x
    x = 329,755.57/511.26
  6. Step 6: Final answer
    x = 644.99

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1.5x scale

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.