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Finding the Fourth Proportional to 392.83, 589.40 and 290.97

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Solution

The fourth proportional to 392.83, 589.40 and 290.97 is: 436.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.83 : 589.40 = 290.97 : x
  2. Step 2: Convert to fraction form
    392.83/589.40 = 290.97/x
  3. Step 3: Cross multiply
    392.83x = 589.40 × 290.97
  4. Step 4: Simplify right side
    392.83x = 171,498.46
  5. Step 5: Solve for x
    x = 171,498.46/392.83
  6. Step 6: Final answer
    x = 436.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.