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Finding the Fourth Proportional to 518,656.50, 778,290.93 and 219,117.69

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Solution

The fourth proportional to 518,656.50, 778,290.93 and 219,117.69 is: 328,805.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,656.50 : 778,290.93 = 219,117.69 : x
  2. Step 2: Convert to fraction form
    518,656.50/778,290.93 = 219,117.69/x
  3. Step 3: Cross multiply
    518,656.50x = 778,290.93 × 219,117.69
  4. Step 4: Simplify right side
    518,656.50x = 170,537,310,729.55
  5. Step 5: Solve for x
    x = 170,537,310,729.55/518,656.50
  6. Step 6: Final answer
    x = 328,805.89

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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.