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Finding the Fourth Proportional to 290,964.61, 436,048.79 and 219,828.79

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Solution

The fourth proportional to 290,964.61, 436,048.79 and 219,828.79 is: 329,442.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,964.61 : 436,048.79 = 219,828.79 : x
  2. Step 2: Convert to fraction form
    290,964.61/436,048.79 = 219,828.79/x
  3. Step 3: Cross multiply
    290,964.61x = 436,048.79 × 219,828.79
  4. Step 4: Simplify right side
    290,964.61x = 95,856,076,787.52
  5. Step 5: Solve for x
    x = 95,856,076,787.52/290,964.61
  6. Step 6: Final answer
    x = 329,442.39

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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.