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Finding the Fourth Proportional to 265,619.20, 398,428.80 and 194,760.40

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Solution

The fourth proportional to 265,619.20, 398,428.80 and 194,760.40 is: 292,140.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,619.20 : 398,428.80 = 194,760.40 : x
  2. Step 2: Convert to fraction form
    265,619.20/398,428.80 = 194,760.40/x
  3. Step 3: Cross multiply
    265,619.20x = 398,428.80 × 194,760.40
  4. Step 4: Simplify right side
    265,619.20x = 77,598,152,459.52
  5. Step 5: Solve for x
    x = 77,598,152,459.52/265,619.20
  6. Step 6: Final answer
    x = 292,140.60

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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.