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Finding the Fourth Proportional to 519,128.60, 778,692.90 and 366,913.40

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Solution

The fourth proportional to 519,128.60, 778,692.90 and 366,913.40 is: 550,370.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,128.60 : 778,692.90 = 366,913.40 : x
  2. Step 2: Convert to fraction form
    519,128.60/778,692.90 = 366,913.40/x
  3. Step 3: Cross multiply
    519,128.60x = 778,692.90 × 366,913.40
  4. Step 4: Simplify right side
    519,128.60x = 285,712,859,494.86
  5. Step 5: Solve for x
    x = 285,712,859,494.86/519,128.60
  6. Step 6: Final answer
    x = 550,370.10

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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.