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Finding the Fourth Proportional to 822.96, 1,227.79 and 740.74

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Solution

The fourth proportional to 822.96, 1,227.79 and 740.74 is: 1,105.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.96 : 1,227.79 = 740.74 : x
  2. Step 2: Convert to fraction form
    822.96/1,227.79 = 740.74/x
  3. Step 3: Cross multiply
    822.96x = 1,227.79 × 740.74
  4. Step 4: Simplify right side
    822.96x = 909,473.16
  5. Step 5: Solve for x
    x = 909,473.16/822.96
  6. Step 6: Final answer
    x = 1,105.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.