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Finding the Fourth Proportional to 518,603.50, 778,211.43 and 219,064.69

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Solution

The fourth proportional to 518,603.50, 778,211.43 and 219,064.69 is: 328,726.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,603.50 : 778,211.43 = 219,064.69 : x
  2. Step 2: Convert to fraction form
    518,603.50/778,211.43 = 219,064.69/x
  3. Step 3: Cross multiply
    518,603.50x = 778,211.43 × 219,064.69
  4. Step 4: Simplify right side
    518,603.50x = 170,478,645,667.41
  5. Step 5: Solve for x
    x = 170,478,645,667.41/518,603.50
  6. Step 6: Final answer
    x = 328,726.37

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1.5x scale

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.