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Finding the Fourth Proportional to 829.73, 1,145.10 and 456.79

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Solution

The fourth proportional to 829.73, 1,145.10 and 456.79 is: 630.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.73 : 1,145.10 = 456.79 : x
  2. Step 2: Convert to fraction form
    829.73/1,145.10 = 456.79/x
  3. Step 3: Cross multiply
    829.73x = 1,145.10 × 456.79
  4. Step 4: Simplify right side
    829.73x = 523,070.23
  5. Step 5: Solve for x
    x = 523,070.23/829.73
  6. Step 6: Final answer
    x = 630.41

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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.