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Finding the Fourth Proportional to 881.59, 1,322.37 and 518.68

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Solution

The fourth proportional to 881.59, 1,322.37 and 518.68 is: 778.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.59 : 1,322.37 = 518.68 : x
  2. Step 2: Convert to fraction form
    881.59/1,322.37 = 518.68/x
  3. Step 3: Cross multiply
    881.59x = 1,322.37 × 518.68
  4. Step 4: Simplify right side
    881.59x = 685,886.87
  5. Step 5: Solve for x
    x = 685,886.87/881.59
  6. Step 6: Final answer
    x = 778.01

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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.