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Finding the Fourth Proportional to 833.69, 1,149.84 and 777.80

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Solution

The fourth proportional to 833.69, 1,149.84 and 777.80 is: 1,072.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.69 : 1,149.84 = 777.80 : x
  2. Step 2: Convert to fraction form
    833.69/1,149.84 = 777.80/x
  3. Step 3: Cross multiply
    833.69x = 1,149.84 × 777.80
  4. Step 4: Simplify right side
    833.69x = 894,339.80
  5. Step 5: Solve for x
    x = 894,339.80/833.69
  6. Step 6: Final answer
    x = 1,072.76

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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.