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Finding the Fourth Proportional to 827.81, 1,142.33 and 473.70

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Solution

The fourth proportional to 827.81, 1,142.33 and 473.70 is: 653.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.81 : 1,142.33 = 473.70 : x
  2. Step 2: Convert to fraction form
    827.81/1,142.33 = 473.70/x
  3. Step 3: Cross multiply
    827.81x = 1,142.33 × 473.70
  4. Step 4: Simplify right side
    827.81x = 541,119.35
  5. Step 5: Solve for x
    x = 541,119.35/827.81
  6. Step 6: Final answer
    x = 653.68

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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.