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Finding the Fourth Proportional to 866.96, 1,300.48 and 611.60

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Solution

The fourth proportional to 866.96, 1,300.48 and 611.60 is: 917.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.96 : 1,300.48 = 611.60 : x
  2. Step 2: Convert to fraction form
    866.96/1,300.48 = 611.60/x
  3. Step 3: Cross multiply
    866.96x = 1,300.48 × 611.60
  4. Step 4: Simplify right side
    866.96x = 795,373.57
  5. Step 5: Solve for x
    x = 795,373.57/866.96
  6. Step 6: Final answer
    x = 917.43

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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.