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Finding the Fourth Proportional to 829.45, 1,144.60 and 497.68

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Solution

The fourth proportional to 829.45, 1,144.60 and 497.68 is: 686.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.45 : 1,144.60 = 497.68 : x
  2. Step 2: Convert to fraction form
    829.45/1,144.60 = 497.68/x
  3. Step 3: Cross multiply
    829.45x = 1,144.60 × 497.68
  4. Step 4: Simplify right side
    829.45x = 569,644.53
  5. Step 5: Solve for x
    x = 569,644.53/829.45
  6. Step 6: Final answer
    x = 686.77

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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.