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Finding the Fourth Proportional to 618,663.65, 928,143.09 and 219,339.32

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Solution

The fourth proportional to 618,663.65, 928,143.09 and 219,339.32 is: 329,061.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,663.65 : 928,143.09 = 219,339.32 : x
  2. Step 2: Convert to fraction form
    618,663.65/928,143.09 = 219,339.32/x
  3. Step 3: Cross multiply
    618,663.65x = 928,143.09 × 219,339.32
  4. Step 4: Simplify right side
    618,663.65x = 203,578,269,582.58
  5. Step 5: Solve for x
    x = 203,578,269,582.58/618,663.65
  6. Step 6: Final answer
    x = 329,061.31

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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.