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Finding the Fourth Proportional to 518,786.40, 778,408.32 and 219,473.52

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Solution

The fourth proportional to 518,786.40, 778,408.32 and 219,473.52 is: 329,307.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,786.40 : 778,408.32 = 219,473.52 : x
  2. Step 2: Convert to fraction form
    518,786.40/778,408.32 = 219,473.52/x
  3. Step 3: Cross multiply
    518,786.40x = 778,408.32 × 219,473.52
  4. Step 4: Simplify right side
    518,786.40x = 170,840,013,987.69
  5. Step 5: Solve for x
    x = 170,840,013,987.69/518,786.40
  6. Step 6: Final answer
    x = 329,307.04

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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.