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Finding the Fourth Proportional to 609.81, 841.23 and 400.33

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Solution

The fourth proportional to 609.81, 841.23 and 400.33 is: 552.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.81 : 841.23 = 400.33 : x
  2. Step 2: Convert to fraction form
    609.81/841.23 = 400.33/x
  3. Step 3: Cross multiply
    609.81x = 841.23 × 400.33
  4. Step 4: Simplify right side
    609.81x = 336,769.61
  5. Step 5: Solve for x
    x = 336,769.61/609.81
  6. Step 6: Final answer
    x = 552.25

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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.