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Finding the Fourth Proportional to 1,072.88, 1,609.47 and 342.29

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Solution

The fourth proportional to 1,072.88, 1,609.47 and 342.29 is: 513.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.88 : 1,609.47 = 342.29 : x
  2. Step 2: Convert to fraction form
    1,072.88/1,609.47 = 342.29/x
  3. Step 3: Cross multiply
    1,072.88x = 1,609.47 × 342.29
  4. Step 4: Simplify right side
    1,072.88x = 550,909.51
  5. Step 5: Solve for x
    x = 550,909.51/1,072.88
  6. Step 6: Final answer
    x = 513.49

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Double scale
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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.