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Finding the Fourth Proportional to 898.92, 1,241.10 and 637.20

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Solution

The fourth proportional to 898.92, 1,241.10 and 637.20 is: 879.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.92 : 1,241.10 = 637.20 : x
  2. Step 2: Convert to fraction form
    898.92/1,241.10 = 637.20/x
  3. Step 3: Cross multiply
    898.92x = 1,241.10 × 637.20
  4. Step 4: Simplify right side
    898.92x = 790,828.92
  5. Step 5: Solve for x
    x = 790,828.92/898.92
  6. Step 6: Final answer
    x = 879.75

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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.