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Finding the Fourth Proportional to 719,638.20, 993,081.74 and 397,341.36

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Solution

The fourth proportional to 719,638.20, 993,081.74 and 397,341.36 is: 548,320.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,638.20 : 993,081.74 = 397,341.36 : x
  2. Step 2: Convert to fraction form
    719,638.20/993,081.74 = 397,341.36/x
  3. Step 3: Cross multiply
    719,638.20x = 993,081.74 × 397,341.36
  4. Step 4: Simplify right side
    719,638.20x = 394,592,447,176.06
  5. Step 5: Solve for x
    x = 394,592,447,176.06/719,638.20
  6. Step 6: Final answer
    x = 548,320.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.