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Finding the Fourth Proportional to 519,209.72, 716,545.36 and 289,811.64

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Solution

The fourth proportional to 519,209.72, 716,545.36 and 289,811.64 is: 399,960.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,209.72 : 716,545.36 = 289,811.64 : x
  2. Step 2: Convert to fraction form
    519,209.72/716,545.36 = 289,811.64/x
  3. Step 3: Cross multiply
    519,209.72x = 716,545.36 × 289,811.64
  4. Step 4: Simplify right side
    519,209.72x = 207,663,184,466.93
  5. Step 5: Solve for x
    x = 207,663,184,466.93/519,209.72
  6. Step 6: Final answer
    x = 399,960.13

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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.