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Finding the Fourth Proportional to 827.38, 1,141.79 and 478.07

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Solution

The fourth proportional to 827.38, 1,141.79 and 478.07 is: 659.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.38 : 1,141.79 = 478.07 : x
  2. Step 2: Convert to fraction form
    827.38/1,141.79 = 478.07/x
  3. Step 3: Cross multiply
    827.38x = 1,141.79 × 478.07
  4. Step 4: Simplify right side
    827.38x = 545,855.55
  5. Step 5: Solve for x
    x = 545,855.55/827.38
  6. Step 6: Final answer
    x = 659.74

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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.