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Finding the Fourth Proportional to 611,128.17, 843,350.78 and 339,189.07

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Solution

The fourth proportional to 611,128.17, 843,350.78 and 339,189.07 is: 468,077.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,128.17 : 843,350.78 = 339,189.07 : x
  2. Step 2: Convert to fraction form
    611,128.17/843,350.78 = 339,189.07/x
  3. Step 3: Cross multiply
    611,128.17x = 843,350.78 × 339,189.07
  4. Step 4: Simplify right side
    611,128.17x = 286,055,366,751.98
  5. Step 5: Solve for x
    x = 286,055,366,751.98/611,128.17
  6. Step 6: Final answer
    x = 468,077.53

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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.