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Finding the Fourth Proportional to 609.32, 840.74 and 360.65

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Solution

The fourth proportional to 609.32, 840.74 and 360.65 is: 497.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.32 : 840.74 = 360.65 : x
  2. Step 2: Convert to fraction form
    609.32/840.74 = 360.65/x
  3. Step 3: Cross multiply
    609.32x = 840.74 × 360.65
  4. Step 4: Simplify right side
    609.32x = 303,206.87
  5. Step 5: Solve for x
    x = 303,206.87/609.32
  6. Step 6: Final answer
    x = 497.62

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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.