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Finding the Fourth Proportional to 620,367.12, 856,085.04 and 379,053.60

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Solution

The fourth proportional to 620,367.12, 856,085.04 and 379,053.60 is: 523,080.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,367.12 : 856,085.04 = 379,053.60 : x
  2. Step 2: Convert to fraction form
    620,367.12/856,085.04 = 379,053.60/x
  3. Step 3: Cross multiply
    620,367.12x = 856,085.04 × 379,053.60
  4. Step 4: Simplify right side
    620,367.12x = 324,502,116,318.14
  5. Step 5: Solve for x
    x = 324,502,116,318.14/620,367.12
  6. Step 6: Final answer
    x = 523,080.78

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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.