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Finding the Fourth Proportional to 898.63, 1,239.90 and 544.54

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Solution

The fourth proportional to 898.63, 1,239.90 and 544.54 is: 751.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.63 : 1,239.90 = 544.54 : x
  2. Step 2: Convert to fraction form
    898.63/1,239.90 = 544.54/x
  3. Step 3: Cross multiply
    898.63x = 1,239.90 × 544.54
  4. Step 4: Simplify right side
    898.63x = 675,175.15
  5. Step 5: Solve for x
    x = 675,175.15/898.63
  6. Step 6: Final answer
    x = 751.34

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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.