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Finding the Fourth Proportional to 519,331.40, 778,920.30 and 145,392.20

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Solution

The fourth proportional to 519,331.40, 778,920.30 and 145,392.20 is: 218,066.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,331.40 : 778,920.30 = 145,392.20 : x
  2. Step 2: Convert to fraction form
    519,331.40/778,920.30 = 145,392.20/x
  3. Step 3: Cross multiply
    519,331.40x = 778,920.30 × 145,392.20
  4. Step 4: Simplify right side
    519,331.40x = 113,248,936,041.66
  5. Step 5: Solve for x
    x = 113,248,936,041.66/519,331.40
  6. Step 6: Final answer
    x = 218,066.80

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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.