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Finding the Fourth Proportional to 981.77, 1,350.85 and 804.08

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Solution

The fourth proportional to 981.77, 1,350.85 and 804.08 is: 1,106.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.77 : 1,350.85 = 804.08 : x
  2. Step 2: Convert to fraction form
    981.77/1,350.85 = 804.08/x
  3. Step 3: Cross multiply
    981.77x = 1,350.85 × 804.08
  4. Step 4: Simplify right side
    981.77x = 1,086,189.01
  5. Step 5: Solve for x
    x = 1,086,189.01/981.77
  6. Step 6: Final answer
    x = 1,106.36

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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.