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Finding the Fourth Proportional to 472,392,690.60, 708,589,035.90 and 300,630,959.40

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Solution

The fourth proportional to 472,392,690.60, 708,589,035.90 and 300,630,959.40 is: 450,946,439.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,392,690.60 : 708,589,035.90 = 300,630,959.40 : x
  2. Step 2: Convert to fraction form
    472,392,690.60/708,589,035.90 = 300,630,959.40/x
  3. Step 3: Cross multiply
    472,392,690.60x = 708,589,035.90 × 300,630,959.40
  4. Step 4: Simplify right side
    472,392,690.60x = 213,023,801,682,938,016
  5. Step 5: Solve for x
    x = 213,023,801,682,938,016/472,392,690.60
  6. Step 6: Final answer
    x = 450,946,439.10

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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.