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Finding the Fourth Proportional to 609.51, 840.99 and 360.64

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Solution

The fourth proportional to 609.51, 840.99 and 360.64 is: 497.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.51 : 840.99 = 360.64 : x
  2. Step 2: Convert to fraction form
    609.51/840.99 = 360.64/x
  3. Step 3: Cross multiply
    609.51x = 840.99 × 360.64
  4. Step 4: Simplify right side
    609.51x = 303,294.63
  5. Step 5: Solve for x
    x = 303,294.63/609.51
  6. Step 6: Final answer
    x = 497.60

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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.