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Finding the Fourth Proportional to 1,857.66, 2,782.09 and 1,612.85

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Solution

The fourth proportional to 1,857.66, 2,782.09 and 1,612.85 is: 2,415.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857.66 : 2,782.09 = 1,612.85 : x
  2. Step 2: Convert to fraction form
    1,857.66/2,782.09 = 1,612.85/x
  3. Step 3: Cross multiply
    1,857.66x = 2,782.09 × 1,612.85
  4. Step 4: Simplify right side
    1,857.66x = 4,487,085.79
  5. Step 5: Solve for x
    x = 4,487,085.79/1,857.66
  6. Step 6: Final answer
    x = 2,415.46

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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.