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Finding the Fourth Proportional to 356,616.21, 492,180.81 and 220,693.97

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Solution

The fourth proportional to 356,616.21, 492,180.81 and 220,693.97 is: 304,588.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,616.21 : 492,180.81 = 220,693.97 : x
  2. Step 2: Convert to fraction form
    356,616.21/492,180.81 = 220,693.97/x
  3. Step 3: Cross multiply
    356,616.21x = 492,180.81 × 220,693.97
  4. Step 4: Simplify right side
    356,616.21x = 108,621,334,455.81
  5. Step 5: Solve for x
    x = 108,621,334,455.81/356,616.21
  6. Step 6: Final answer
    x = 304,588.89

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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.