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Finding the Fourth Proportional to 1,708.36, 2,561.37 and 612.70

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Solution

The fourth proportional to 1,708.36, 2,561.37 and 612.70 is: 918.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,708.36 : 2,561.37 = 612.70 : x
  2. Step 2: Convert to fraction form
    1,708.36/2,561.37 = 612.70/x
  3. Step 3: Cross multiply
    1,708.36x = 2,561.37 × 612.70
  4. Step 4: Simplify right side
    1,708.36x = 1,569,351.40
  5. Step 5: Solve for x
    x = 1,569,351.40/1,708.36
  6. Step 6: Final answer
    x = 918.63

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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.