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Finding the Fourth Proportional to 1,917.23, 2,875.11 and 684.41

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Solution

The fourth proportional to 1,917.23, 2,875.11 and 684.41 is: 1,026.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.23 : 2,875.11 = 684.41 : x
  2. Step 2: Convert to fraction form
    1,917.23/2,875.11 = 684.41/x
  3. Step 3: Cross multiply
    1,917.23x = 2,875.11 × 684.41
  4. Step 4: Simplify right side
    1,917.23x = 1,967,739.66
  5. Step 5: Solve for x
    x = 1,967,739.66/1,917.23
  6. Step 6: Final answer
    x = 1,026.35

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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.