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Finding the Fourth Proportional to 611,128.19, 843,350.55 and 339,198.46

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Solution

The fourth proportional to 611,128.19, 843,350.55 and 339,198.46 is: 468,090.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,128.19 : 843,350.55 = 339,198.46 : x
  2. Step 2: Convert to fraction form
    611,128.19/843,350.55 = 339,198.46/x
  3. Step 3: Cross multiply
    611,128.19x = 843,350.55 × 339,198.46
  4. Step 4: Simplify right side
    611,128.19x = 286,063,207,800.15
  5. Step 5: Solve for x
    x = 286,063,207,800.15/611,128.19
  6. Step 6: Final answer
    x = 468,090.35

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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.