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Finding the Fourth Proportional to 317,640.28, 438,344.45 and 174,409.60

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Solution

The fourth proportional to 317,640.28, 438,344.45 and 174,409.60 is: 240,685.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,640.28 : 438,344.45 = 174,409.60 : x
  2. Step 2: Convert to fraction form
    317,640.28/438,344.45 = 174,409.60/x
  3. Step 3: Cross multiply
    317,640.28x = 438,344.45 × 174,409.60
  4. Step 4: Simplify right side
    317,640.28x = 76,451,480,186.72
  5. Step 5: Solve for x
    x = 76,451,480,186.72/317,640.28
  6. Step 6: Final answer
    x = 240,685.72

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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.