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Finding the Fourth Proportional to 219,918.80, 329,878.20 and 193,653.20

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Solution

The fourth proportional to 219,918.80, 329,878.20 and 193,653.20 is: 290,479.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,918.80 : 329,878.20 = 193,653.20 : x
  2. Step 2: Convert to fraction form
    219,918.80/329,878.20 = 193,653.20/x
  3. Step 3: Cross multiply
    219,918.80x = 329,878.20 × 193,653.20
  4. Step 4: Simplify right side
    219,918.80x = 63,881,969,040.24
  5. Step 5: Solve for x
    x = 63,881,969,040.24/219,918.80
  6. Step 6: Final answer
    x = 290,479.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.