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Finding the Fourth Proportional to 520,074.90, 778,800.15 and 415,098.90

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Solution

The fourth proportional to 520,074.90, 778,800.15 and 415,098.90 is: 621,601.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,074.90 : 778,800.15 = 415,098.90 : x
  2. Step 2: Convert to fraction form
    520,074.90/778,800.15 = 415,098.90/x
  3. Step 3: Cross multiply
    520,074.90x = 778,800.15 × 415,098.90
  4. Step 4: Simplify right side
    520,074.90x = 323,279,085,584.84
  5. Step 5: Solve for x
    x = 323,279,085,584.84/520,074.90
  6. Step 6: Final answer
    x = 621,601.01

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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.