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Finding the Fourth Proportional to 1,074.33, 1,612.34 and 612.32

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Solution

The fourth proportional to 1,074.33, 1,612.34 and 612.32 is: 918.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.33 : 1,612.34 = 612.32 : x
  2. Step 2: Convert to fraction form
    1,074.33/1,612.34 = 612.32/x
  3. Step 3: Cross multiply
    1,074.33x = 1,612.34 × 612.32
  4. Step 4: Simplify right side
    1,074.33x = 987,273.12
  5. Step 5: Solve for x
    x = 987,273.12/1,074.33
  6. Step 6: Final answer
    x = 918.97

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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.