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Finding the Fourth Proportional to 424.51, 635.90 and 346.70

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Solution

The fourth proportional to 424.51, 635.90 and 346.70 is: 519.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.51 : 635.90 = 346.70 : x
  2. Step 2: Convert to fraction form
    424.51/635.90 = 346.70/x
  3. Step 3: Cross multiply
    424.51x = 635.90 × 346.70
  4. Step 4: Simplify right side
    424.51x = 220,468.12
  5. Step 5: Solve for x
    x = 220,468.12/424.51
  6. Step 6: Final answer
    x = 519.34

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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.