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Finding the Fourth Proportional to 639,876.80, 883,024.80 and 353,416.52

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Solution

The fourth proportional to 639,876.80, 883,024.80 and 353,416.52 is: 487,711.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,876.80 : 883,024.80 = 353,416.52 : x
  2. Step 2: Convert to fraction form
    639,876.80/883,024.80 = 353,416.52/x
  3. Step 3: Cross multiply
    639,876.80x = 883,024.80 × 353,416.52
  4. Step 4: Simplify right side
    639,876.80x = 312,075,551,889.70
  5. Step 5: Solve for x
    x = 312,075,551,889.70/639,876.80
  6. Step 6: Final answer
    x = 487,711.93

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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.