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Finding the Fourth Proportional to 845.88, 1,266.60 and 664.20

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Solution

The fourth proportional to 845.88, 1,266.60 and 664.20 is: 994.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.88 : 1,266.60 = 664.20 : x
  2. Step 2: Convert to fraction form
    845.88/1,266.60 = 664.20/x
  3. Step 3: Cross multiply
    845.88x = 1,266.60 × 664.20
  4. Step 4: Simplify right side
    845.88x = 841,275.72
  5. Step 5: Solve for x
    x = 841,275.72/845.88
  6. Step 6: Final answer
    x = 994.56

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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.