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Finding the Fourth Proportional to 1,073.58, 1,609.28 and 342.62

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Solution

The fourth proportional to 1,073.58, 1,609.28 and 342.62 is: 513.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,073.58 : 1,609.28 = 342.62 : x
  2. Step 2: Convert to fraction form
    1,073.58/1,609.28 = 342.62/x
  3. Step 3: Cross multiply
    1,073.58x = 1,609.28 × 342.62
  4. Step 4: Simplify right side
    1,073.58x = 551,371.51
  5. Step 5: Solve for x
    x = 551,371.51/1,073.58
  6. Step 6: Final answer
    x = 513.58

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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.