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Finding the Fourth Proportional to 640,006.79, 883,206.66 and 353,526.87

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Solution

The fourth proportional to 640,006.79, 883,206.66 and 353,526.87 is: 487,865.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,006.79 : 883,206.66 = 353,526.87 : x
  2. Step 2: Convert to fraction form
    640,006.79/883,206.66 = 353,526.87/x
  3. Step 3: Cross multiply
    640,006.79x = 883,206.66 × 353,526.87
  4. Step 4: Simplify right side
    640,006.79x = 312,237,286,072.95
  5. Step 5: Solve for x
    x = 312,237,286,072.95/640,006.79
  6. Step 6: Final answer
    x = 487,865.59

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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.