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Finding the Fourth Proportional to 899.76, 1,240.94 and 635.09

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Solution

The fourth proportional to 899.76, 1,240.94 and 635.09 is: 875.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.76 : 1,240.94 = 635.09 : x
  2. Step 2: Convert to fraction form
    899.76/1,240.94 = 635.09/x
  3. Step 3: Cross multiply
    899.76x = 1,240.94 × 635.09
  4. Step 4: Simplify right side
    899.76x = 788,099.20
  5. Step 5: Solve for x
    x = 788,099.20/899.76
  6. Step 6: Final answer
    x = 875.90

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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.