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Finding the Fourth Proportional to 520,886,578.61, 781,483,352.64 and 209,834,130.17

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Solution

The fourth proportional to 520,886,578.61, 781,483,352.64 and 209,834,130.17 is: 314,813,025.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,886,578.61 : 781,483,352.64 = 209,834,130.17 : x
  2. Step 2: Convert to fraction form
    520,886,578.61/781,483,352.64 = 209,834,130.17/x
  3. Step 3: Cross multiply
    520,886,578.61x = 781,483,352.64 × 209,834,130.17
  4. Step 4: Simplify right side
    520,886,578.61x = 163,981,879,540,618,432
  5. Step 5: Solve for x
    x = 163,981,879,540,618,432/520,886,578.61
  6. Step 6: Final answer
    x = 314,813,025.09

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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.