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Finding the Fourth Proportional to 639,920.80, 958,498.80 and 529,328.80

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Solution

The fourth proportional to 639,920.80, 958,498.80 and 529,328.80 is: 792,849.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,920.80 : 958,498.80 = 529,328.80 : x
  2. Step 2: Convert to fraction form
    639,920.80/958,498.80 = 529,328.80/x
  3. Step 3: Cross multiply
    639,920.80x = 958,498.80 × 529,328.80
  4. Step 4: Simplify right side
    639,920.80x = 507,361,019,605.44
  5. Step 5: Solve for x
    x = 507,361,019,605.44/639,920.80
  6. Step 6: Final answer
    x = 792,849.71

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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.