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Finding the Fourth Proportional to 703,784.50, 971,215.92 and 393,683.69

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Solution

The fourth proportional to 703,784.50, 971,215.92 and 393,683.69 is: 543,279.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,784.50 : 971,215.92 = 393,683.69 : x
  2. Step 2: Convert to fraction form
    703,784.50/971,215.92 = 393,683.69/x
  3. Step 3: Cross multiply
    703,784.50x = 971,215.92 × 393,683.69
  4. Step 4: Simplify right side
    703,784.50x = 382,351,869,600.39
  5. Step 5: Solve for x
    x = 382,351,869,600.39/703,784.50
  6. Step 6: Final answer
    x = 543,279.76

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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.