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Finding the Fourth Proportional to 515,693.13, 711,620.89 and 286,232.37

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Solution

The fourth proportional to 515,693.13, 711,620.89 and 286,232.37 is: 394,980.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,693.13 : 711,620.89 = 286,232.37 : x
  2. Step 2: Convert to fraction form
    515,693.13/711,620.89 = 286,232.37/x
  3. Step 3: Cross multiply
    515,693.13x = 711,620.89 × 286,232.37
  4. Step 4: Simplify right side
    515,693.13x = 203,688,935,114.27
  5. Step 5: Solve for x
    x = 203,688,935,114.27/515,693.13
  6. Step 6: Final answer
    x = 394,980.90

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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.