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Finding the Fourth Proportional to 618,421.72, 927,319.12 and 219,006.27

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Solution

The fourth proportional to 618,421.72, 927,319.12 and 219,006.27 is: 328,398.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,421.72 : 927,319.12 = 219,006.27 : x
  2. Step 2: Convert to fraction form
    618,421.72/927,319.12 = 219,006.27/x
  3. Step 3: Cross multiply
    618,421.72x = 927,319.12 × 219,006.27
  4. Step 4: Simplify right side
    618,421.72x = 203,088,701,570.88
  5. Step 5: Solve for x
    x = 203,088,701,570.88/618,421.72
  6. Step 6: Final answer
    x = 328,398.40

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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.