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Finding the Fourth Proportional to 343,938.40, 515,734.80 and 156,738.40

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Solution

The fourth proportional to 343,938.40, 515,734.80 and 156,738.40 is: 235,028.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,938.40 : 515,734.80 = 156,738.40 : x
  2. Step 2: Convert to fraction form
    343,938.40/515,734.80 = 156,738.40/x
  3. Step 3: Cross multiply
    343,938.40x = 515,734.80 × 156,738.40
  4. Step 4: Simplify right side
    343,938.40x = 80,835,447,376.32
  5. Step 5: Solve for x
    x = 80,835,447,376.32/343,938.40
  6. Step 6: Final answer
    x = 235,028.85

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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.