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Finding the Fourth Proportional to 317,654.36, 438,363.40 and 188,618.60

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Solution

The fourth proportional to 317,654.36, 438,363.40 and 188,618.60 is: 260,293.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,654.36 : 438,363.40 = 188,618.60 : x
  2. Step 2: Convert to fraction form
    317,654.36/438,363.40 = 188,618.60/x
  3. Step 3: Cross multiply
    317,654.36x = 438,363.40 × 188,618.60
  4. Step 4: Simplify right side
    317,654.36x = 82,683,490,799.24
  5. Step 5: Solve for x
    x = 82,683,490,799.24/317,654.36
  6. Step 6: Final answer
    x = 260,293.90

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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.