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Finding the Fourth Proportional to 545,911.50, 753,363.27 and 319,561.86

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Solution

The fourth proportional to 545,911.50, 753,363.27 and 319,561.86 is: 440,998.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,911.50 : 753,363.27 = 319,561.86 : x
  2. Step 2: Convert to fraction form
    545,911.50/753,363.27 = 319,561.86/x
  3. Step 3: Cross multiply
    545,911.50x = 753,363.27 × 319,561.86
  4. Step 4: Simplify right side
    545,911.50x = 240,746,167,816.88
  5. Step 5: Solve for x
    x = 240,746,167,816.88/545,911.50
  6. Step 6: Final answer
    x = 440,998.53

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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.