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Finding the Fourth Proportional to 829.65, 1,245.29 and 632.82

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Solution

The fourth proportional to 829.65, 1,245.29 and 632.82 is: 949.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.65 : 1,245.29 = 632.82 : x
  2. Step 2: Convert to fraction form
    829.65/1,245.29 = 632.82/x
  3. Step 3: Cross multiply
    829.65x = 1,245.29 × 632.82
  4. Step 4: Simplify right side
    829.65x = 788,044.42
  5. Step 5: Solve for x
    x = 788,044.42/829.65
  6. Step 6: Final answer
    x = 949.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.