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Finding the Fourth Proportional to 621,812.60, 933,410.10 and 385,422.20

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Solution

The fourth proportional to 621,812.60, 933,410.10 and 385,422.20 is: 578,561.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,812.60 : 933,410.10 = 385,422.20 : x
  2. Step 2: Convert to fraction form
    621,812.60/933,410.10 = 385,422.20/x
  3. Step 3: Cross multiply
    621,812.60x = 933,410.10 × 385,422.20
  4. Step 4: Simplify right side
    621,812.60x = 359,756,974,244.22
  5. Step 5: Solve for x
    x = 359,756,974,244.22/621,812.60
  6. Step 6: Final answer
    x = 578,561.73

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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.