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Finding the Fourth Proportional to 265,621.20, 398,431.80 and 194,762.40

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Solution

The fourth proportional to 265,621.20, 398,431.80 and 194,762.40 is: 292,143.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,621.20 : 398,431.80 = 194,762.40 : x
  2. Step 2: Convert to fraction form
    265,621.20/398,431.80 = 194,762.40/x
  3. Step 3: Cross multiply
    265,621.20x = 398,431.80 × 194,762.40
  4. Step 4: Simplify right side
    265,621.20x = 77,599,533,604.32
  5. Step 5: Solve for x
    x = 77,599,533,604.32/265,621.20
  6. Step 6: Final answer
    x = 292,143.60

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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.