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Finding the Fourth Proportional to 343,998.40, 515,824.80 and 156,798.40

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Solution

The fourth proportional to 343,998.40, 515,824.80 and 156,798.40 is: 235,118.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,998.40 : 515,824.80 = 156,798.40 : x
  2. Step 2: Convert to fraction form
    343,998.40/515,824.80 = 156,798.40/x
  3. Step 3: Cross multiply
    343,998.40x = 515,824.80 × 156,798.40
  4. Step 4: Simplify right side
    343,998.40x = 80,880,503,320.32
  5. Step 5: Solve for x
    x = 80,880,503,320.32/343,998.40
  6. Step 6: Final answer
    x = 235,118.84

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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.