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Finding the Fourth Proportional to 609.65, 841.00 and 388.22

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Solution

The fourth proportional to 609.65, 841.00 and 388.22 is: 535.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.65 : 841.00 = 388.22 : x
  2. Step 2: Convert to fraction form
    609.65/841.00 = 388.22/x
  3. Step 3: Cross multiply
    609.65x = 841.00 × 388.22
  4. Step 4: Simplify right side
    609.65x = 326,488.57
  5. Step 5: Solve for x
    x = 326,488.57/609.65
  6. Step 6: Final answer
    x = 535.54

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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.