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Finding the Fourth Proportional to 898.58, 1,344.72 and 551.81

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Solution

The fourth proportional to 898.58, 1,344.72 and 551.81 is: 825.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.58 : 1,344.72 = 551.81 : x
  2. Step 2: Convert to fraction form
    898.58/1,344.72 = 551.81/x
  3. Step 3: Cross multiply
    898.58x = 1,344.72 × 551.81
  4. Step 4: Simplify right side
    898.58x = 742,029.94
  5. Step 5: Solve for x
    x = 742,029.94/898.58
  6. Step 6: Final answer
    x = 825.78

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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.