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Finding the Fourth Proportional to 353,368.70, 528,715.50 and 209,351.86

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Solution

The fourth proportional to 353,368.70, 528,715.50 and 209,351.86 is: 313,235.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,368.70 : 528,715.50 = 209,351.86 : x
  2. Step 2: Convert to fraction form
    353,368.70/528,715.50 = 209,351.86/x
  3. Step 3: Cross multiply
    353,368.70x = 528,715.50 × 209,351.86
  4. Step 4: Simplify right side
    353,368.70x = 110,687,573,335.83
  5. Step 5: Solve for x
    x = 110,687,573,335.83/353,368.70
  6. Step 6: Final answer
    x = 313,235.36

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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.