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Finding the Fourth Proportional to 614,086.18, 920,954.31 and 389,107.06

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Solution

The fourth proportional to 614,086.18, 920,954.31 and 389,107.06 is: 583,549.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,086.18 : 920,954.31 = 389,107.06 : x
  2. Step 2: Convert to fraction form
    614,086.18/920,954.31 = 389,107.06/x
  3. Step 3: Cross multiply
    614,086.18x = 920,954.31 × 389,107.06
  4. Step 4: Simplify right side
    614,086.18x = 358,349,823,958.43
  5. Step 5: Solve for x
    x = 358,349,823,958.43/614,086.18
  6. Step 6: Final answer
    x = 583,549.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.