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Finding the Fourth Proportional to 635.63, 953.19 and 430.26

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Solution

The fourth proportional to 635.63, 953.19 and 430.26 is: 645.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.63 : 953.19 = 430.26 : x
  2. Step 2: Convert to fraction form
    635.63/953.19 = 430.26/x
  3. Step 3: Cross multiply
    635.63x = 953.19 × 430.26
  4. Step 4: Simplify right side
    635.63x = 410,112.61
  5. Step 5: Solve for x
    x = 410,112.61/635.63
  6. Step 6: Final answer
    x = 645.21

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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.