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Finding the Fourth Proportional to 833.44, 1,149.64 and 668.05

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Solution

The fourth proportional to 833.44, 1,149.64 and 668.05 is: 921.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.44 : 1,149.64 = 668.05 : x
  2. Step 2: Convert to fraction form
    833.44/1,149.64 = 668.05/x
  3. Step 3: Cross multiply
    833.44x = 1,149.64 × 668.05
  4. Step 4: Simplify right side
    833.44x = 768,013.66
  5. Step 5: Solve for x
    x = 768,013.66/833.44
  6. Step 6: Final answer
    x = 921.50

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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.