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Finding the Fourth Proportional to 649.58, 900.18 and 637.25

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Solution

The fourth proportional to 649.58, 900.18 and 637.25 is: 883.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.58 : 900.18 = 637.25 : x
  2. Step 2: Convert to fraction form
    649.58/900.18 = 637.25/x
  3. Step 3: Cross multiply
    649.58x = 900.18 × 637.25
  4. Step 4: Simplify right side
    649.58x = 573,635.20
  5. Step 5: Solve for x
    x = 573,635.20/649.58
  6. Step 6: Final answer
    x = 883.09

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.