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Finding the Fourth Proportional to 392.43, 589.56 and 277.62

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Solution

The fourth proportional to 392.43, 589.56 and 277.62 is: 417.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.43 : 589.56 = 277.62 : x
  2. Step 2: Convert to fraction form
    392.43/589.56 = 277.62/x
  3. Step 3: Cross multiply
    392.43x = 589.56 × 277.62
  4. Step 4: Simplify right side
    392.43x = 163,673.65
  5. Step 5: Solve for x
    x = 163,673.65/392.43
  6. Step 6: Final answer
    x = 417.08

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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.