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Finding the Fourth Proportional to 574,689.28, 861,139.86 and 219,509.44

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Solution

The fourth proportional to 574,689.28, 861,139.86 and 219,509.44 is: 328,922.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    574,689.28 : 861,139.86 = 219,509.44 : x
  2. Step 2: Convert to fraction form
    574,689.28/861,139.86 = 219,509.44/x
  3. Step 3: Cross multiply
    574,689.28x = 861,139.86 × 219,509.44
  4. Step 4: Simplify right side
    574,689.28x = 189,028,328,430.28
  5. Step 5: Solve for x
    x = 189,028,328,430.28/574,689.28
  6. Step 6: Final answer
    x = 328,922.66

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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.