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Finding the Fourth Proportional to 1,708.23, 2,561.91 and 612.44

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Solution

The fourth proportional to 1,708.23, 2,561.91 and 612.44 is: 918.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,708.23 : 2,561.91 = 612.44 : x
  2. Step 2: Convert to fraction form
    1,708.23/2,561.91 = 612.44/x
  3. Step 3: Cross multiply
    1,708.23x = 2,561.91 × 612.44
  4. Step 4: Simplify right side
    1,708.23x = 1,569,016.16
  5. Step 5: Solve for x
    x = 1,569,016.16/1,708.23
  6. Step 6: Final answer
    x = 918.50

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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.