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Finding the Fourth Proportional to 235,838.40, 325,454.67 and 128,408.10

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Solution

The fourth proportional to 235,838.40, 325,454.67 and 128,408.10 is: 177,201.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,838.40 : 325,454.67 = 128,408.10 : x
  2. Step 2: Convert to fraction form
    235,838.40/325,454.67 = 128,408.10/x
  3. Step 3: Cross multiply
    235,838.40x = 325,454.67 × 128,408.10
  4. Step 4: Simplify right side
    235,838.40x = 41,791,015,810.83
  5. Step 5: Solve for x
    x = 41,791,015,810.83/235,838.40
  6. Step 6: Final answer
    x = 177,201.91

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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.