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Finding the Fourth Proportional to 829.39, 1,143.76 and 534.75

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Solution

The fourth proportional to 829.39, 1,143.76 and 534.75 is: 737.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.39 : 1,143.76 = 534.75 : x
  2. Step 2: Convert to fraction form
    829.39/1,143.76 = 534.75/x
  3. Step 3: Cross multiply
    829.39x = 1,143.76 × 534.75
  4. Step 4: Simplify right side
    829.39x = 611,625.66
  5. Step 5: Solve for x
    x = 611,625.66/829.39
  6. Step 6: Final answer
    x = 737.44

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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.