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Finding the Fourth Proportional to 425.35, 637.62 and 315.37

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Solution

The fourth proportional to 425.35, 637.62 and 315.37 is: 472.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.35 : 637.62 = 315.37 : x
  2. Step 2: Convert to fraction form
    425.35/637.62 = 315.37/x
  3. Step 3: Cross multiply
    425.35x = 637.62 × 315.37
  4. Step 4: Simplify right side
    425.35x = 201,086.22
  5. Step 5: Solve for x
    x = 201,086.22/425.35
  6. Step 6: Final answer
    x = 472.75

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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.