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Finding the Fourth Proportional to 829.55, 1,144.80 and 475.49

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Solution

The fourth proportional to 829.55, 1,144.80 and 475.49 is: 656.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.55 : 1,144.80 = 475.49 : x
  2. Step 2: Convert to fraction form
    829.55/1,144.80 = 475.49/x
  3. Step 3: Cross multiply
    829.55x = 1,144.80 × 475.49
  4. Step 4: Simplify right side
    829.55x = 544,338.57
  5. Step 5: Solve for x
    x = 544,338.57/829.55
  6. Step 6: Final answer
    x = 656.19

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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.