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Finding the Fourth Proportional to 317,876.40, 438,670.80 and 174,639.60

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Solution

The fourth proportional to 317,876.40, 438,670.80 and 174,639.60 is: 241,003.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,876.40 : 438,670.80 = 174,639.60 : x
  2. Step 2: Convert to fraction form
    317,876.40/438,670.80 = 174,639.60/x
  3. Step 3: Cross multiply
    317,876.40x = 438,670.80 × 174,639.60
  4. Step 4: Simplify right side
    317,876.40x = 76,609,293,043.68
  5. Step 5: Solve for x
    x = 76,609,293,043.68/317,876.40
  6. Step 6: Final answer
    x = 241,003.40

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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.