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Finding the Fourth Proportional to 638,168.60, 957,188.10 and 217,438.40

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Solution

The fourth proportional to 638,168.60, 957,188.10 and 217,438.40 is: 326,135.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,168.60 : 957,188.10 = 217,438.40 : x
  2. Step 2: Convert to fraction form
    638,168.60/957,188.10 = 217,438.40/x
  3. Step 3: Cross multiply
    638,168.60x = 957,188.10 × 217,438.40
  4. Step 4: Simplify right side
    638,168.60x = 208,129,448,963.04
  5. Step 5: Solve for x
    x = 208,129,448,963.04/638,168.60
  6. Step 6: Final answer
    x = 326,135.52

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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.