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Finding the Fourth Proportional to 656,787.11, 906,365.81 and 354,981.11

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Solution

The fourth proportional to 656,787.11, 906,365.81 and 354,981.11 is: 489,873.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,787.11 : 906,365.81 = 354,981.11 : x
  2. Step 2: Convert to fraction form
    656,787.11/906,365.81 = 354,981.11/x
  3. Step 3: Cross multiply
    656,787.11x = 906,365.81 × 354,981.11
  4. Step 4: Simplify right side
    656,787.11x = 321,742,739,524.94
  5. Step 5: Solve for x
    x = 321,742,739,524.94/656,787.11
  6. Step 6: Final answer
    x = 489,873.71

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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.