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Finding the Fourth Proportional to 620,235.61, 856,017.70 and 378,658.22

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Solution

The fourth proportional to 620,235.61, 856,017.70 and 378,658.22 is: 522,604.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,235.61 : 856,017.70 = 378,658.22 : x
  2. Step 2: Convert to fraction form
    620,235.61/856,017.70 = 378,658.22/x
  3. Step 3: Cross multiply
    620,235.61x = 856,017.70 × 378,658.22
  4. Step 4: Simplify right side
    620,235.61x = 324,138,133,343.76
  5. Step 5: Solve for x
    x = 324,138,133,343.76/620,235.61
  6. Step 6: Final answer
    x = 522,604.84

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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.