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Finding the Fourth Proportional to 635.85, 953.37 and 429.30

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Solution

The fourth proportional to 635.85, 953.37 and 429.30 is: 643.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.85 : 953.37 = 429.30 : x
  2. Step 2: Convert to fraction form
    635.85/953.37 = 429.30/x
  3. Step 3: Cross multiply
    635.85x = 953.37 × 429.30
  4. Step 4: Simplify right side
    635.85x = 409,281.74
  5. Step 5: Solve for x
    x = 409,281.74/635.85
  6. Step 6: Final answer
    x = 643.68

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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.