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Finding the Fourth Proportional to 519,280.80, 778,863.60 and 425,623.20

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Solution

The fourth proportional to 519,280.80, 778,863.60 and 425,623.20 is: 638,387.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,280.80 : 778,863.60 = 425,623.20 : x
  2. Step 2: Convert to fraction form
    519,280.80/778,863.60 = 425,623.20/x
  3. Step 3: Cross multiply
    519,280.80x = 778,863.60 × 425,623.20
  4. Step 4: Simplify right side
    519,280.80x = 331,502,417,795.52
  5. Step 5: Solve for x
    x = 331,502,417,795.52/519,280.80
  6. Step 6: Final answer
    x = 638,387.59

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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.