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Finding the Fourth Proportional to 822.74, 1,134.74 and 656.28

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Solution

The fourth proportional to 822.74, 1,134.74 and 656.28 is: 905.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.74 : 1,134.74 = 656.28 : x
  2. Step 2: Convert to fraction form
    822.74/1,134.74 = 656.28/x
  3. Step 3: Cross multiply
    822.74x = 1,134.74 × 656.28
  4. Step 4: Simplify right side
    822.74x = 744,708.81
  5. Step 5: Solve for x
    x = 744,708.81/822.74
  6. Step 6: Final answer
    x = 905.16

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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.