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Finding the Fourth Proportional to 829.58, 1,144.79 and 497.81

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Solution

The fourth proportional to 829.58, 1,144.79 and 497.81 is: 686.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.58 : 1,144.79 = 497.81 : x
  2. Step 2: Convert to fraction form
    829.58/1,144.79 = 497.81/x
  3. Step 3: Cross multiply
    829.58x = 1,144.79 × 497.81
  4. Step 4: Simplify right side
    829.58x = 569,883.71
  5. Step 5: Solve for x
    x = 569,883.71/829.58
  6. Step 6: Final answer
    x = 686.96

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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.