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Finding the Fourth Proportional to 809.05, 1,112.77 and 651.33

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Solution

The fourth proportional to 809.05, 1,112.77 and 651.33 is: 895.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.05 : 1,112.77 = 651.33 : x
  2. Step 2: Convert to fraction form
    809.05/1,112.77 = 651.33/x
  3. Step 3: Cross multiply
    809.05x = 1,112.77 × 651.33
  4. Step 4: Simplify right side
    809.05x = 724,780.48
  5. Step 5: Solve for x
    x = 724,780.48/809.05
  6. Step 6: Final answer
    x = 895.84

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1.5x scale

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.