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Finding the Fourth Proportional to 883.68, 1,326.60 and 518.64

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Solution

The fourth proportional to 883.68, 1,326.60 and 518.64 is: 778.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.68 : 1,326.60 = 518.64 : x
  2. Step 2: Convert to fraction form
    883.68/1,326.60 = 518.64/x
  3. Step 3: Cross multiply
    883.68x = 1,326.60 × 518.64
  4. Step 4: Simplify right side
    883.68x = 688,027.82
  5. Step 5: Solve for x
    x = 688,027.82/883.68
  6. Step 6: Final answer
    x = 778.59

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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.