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Finding the Fourth Proportional to 2,158.34, 3,237.03 and 842.13

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Solution

The fourth proportional to 2,158.34, 3,237.03 and 842.13 is: 1,263.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.34 : 3,237.03 = 842.13 : x
  2. Step 2: Convert to fraction form
    2,158.34/3,237.03 = 842.13/x
  3. Step 3: Cross multiply
    2,158.34x = 3,237.03 × 842.13
  4. Step 4: Simplify right side
    2,158.34x = 2,725,991.98
  5. Step 5: Solve for x
    x = 2,725,991.98/2,158.34
  6. Step 6: Final answer
    x = 1,263.00

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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.