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Finding the Fourth Proportional to 518,465.60, 777,698.40 and 185,998.40

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Solution

The fourth proportional to 518,465.60, 777,698.40 and 185,998.40 is: 278,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,465.60 : 777,698.40 = 185,998.40 : x
  2. Step 2: Convert to fraction form
    518,465.60/777,698.40 = 185,998.40/x
  3. Step 3: Cross multiply
    518,465.60x = 777,698.40 × 185,998.40
  4. Step 4: Simplify right side
    518,465.60x = 144,650,658,082.56
  5. Step 5: Solve for x
    x = 144,650,658,082.56/518,465.60
  6. Step 6: Final answer
    x = 278,997.60

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Double scale
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Similar ratio
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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.