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Finding the Fourth Proportional to 360.91, 495 and 356.65

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Solution

The fourth proportional to 360.91, 495 and 356.65 is: 489.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.91 : 495 = 356.65 : x
  2. Step 2: Convert to fraction form
    360.91/495 = 356.65/x
  3. Step 3: Cross multiply
    360.91x = 495 × 356.65
  4. Step 4: Simplify right side
    360.91x = 176,541.75
  5. Step 5: Solve for x
    x = 176,541.75/360.91
  6. Step 6: Final answer
    x = 489.16

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.