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Finding the Fourth Proportional to 609.03, 840.24 and 388.08

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Solution

The fourth proportional to 609.03, 840.24 and 388.08 is: 535.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.03 : 840.24 = 388.08 : x
  2. Step 2: Convert to fraction form
    609.03/840.24 = 388.08/x
  3. Step 3: Cross multiply
    609.03x = 840.24 × 388.08
  4. Step 4: Simplify right side
    609.03x = 326,080.34
  5. Step 5: Solve for x
    x = 326,080.34/609.03
  6. Step 6: Final answer
    x = 535.41

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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.