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Finding the Fourth Proportional to 635.05, 874.70 and 631.27

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Solution

The fourth proportional to 635.05, 874.70 and 631.27 is: 869.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.05 : 874.70 = 631.27 : x
  2. Step 2: Convert to fraction form
    635.05/874.70 = 631.27/x
  3. Step 3: Cross multiply
    635.05x = 874.70 × 631.27
  4. Step 4: Simplify right side
    635.05x = 552,168.71
  5. Step 5: Solve for x
    x = 552,168.71/635.05
  6. Step 6: Final answer
    x = 869.49

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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.