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Finding the Fourth Proportional to 829.54, 1,144.79 and 456.53

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Solution

The fourth proportional to 829.54, 1,144.79 and 456.53 is: 630.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.54 : 1,144.79 = 456.53 : x
  2. Step 2: Convert to fraction form
    829.54/1,144.79 = 456.53/x
  3. Step 3: Cross multiply
    829.54x = 1,144.79 × 456.53
  4. Step 4: Simplify right side
    829.54x = 522,630.98
  5. Step 5: Solve for x
    x = 522,630.98/829.54
  6. Step 6: Final answer
    x = 630.03

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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.