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Finding the Fourth Proportional to 851.13, 1,176.03 and 656.33

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Solution

The fourth proportional to 851.13, 1,176.03 and 656.33 is: 906.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.13 : 1,176.03 = 656.33 : x
  2. Step 2: Convert to fraction form
    851.13/1,176.03 = 656.33/x
  3. Step 3: Cross multiply
    851.13x = 1,176.03 × 656.33
  4. Step 4: Simplify right side
    851.13x = 771,857.89
  5. Step 5: Solve for x
    x = 771,857.89/851.13
  6. Step 6: Final answer
    x = 906.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.