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Finding the Fourth Proportional to 625,495.78, 863,228.05 and 353,565.91

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Solution

The fourth proportional to 625,495.78, 863,228.05 and 353,565.91 is: 487,945.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,495.78 : 863,228.05 = 353,565.91 : x
  2. Step 2: Convert to fraction form
    625,495.78/863,228.05 = 353,565.91/x
  3. Step 3: Cross multiply
    625,495.78x = 863,228.05 × 353,565.91
  4. Step 4: Simplify right side
    625,495.78x = 305,208,011,035.78
  5. Step 5: Solve for x
    x = 305,208,011,035.78/625,495.78
  6. Step 6: Final answer
    x = 487,945.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.