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Finding the Fourth Proportional to 442,630,830.80, 663,946,246.20 and 429,876,246.80

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Solution

The fourth proportional to 442,630,830.80, 663,946,246.20 and 429,876,246.80 is: 644,814,370.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,630,830.80 : 663,946,246.20 = 429,876,246.80 : x
  2. Step 2: Convert to fraction form
    442,630,830.80/663,946,246.20 = 429,876,246.80/x
  3. Step 3: Cross multiply
    442,630,830.80x = 663,946,246.20 × 429,876,246.80
  4. Step 4: Simplify right side
    442,630,830.80x = 285,414,720,393,404,800
  5. Step 5: Solve for x
    x = 285,414,720,393,404,800/442,630,830.80
  6. Step 6: Final answer
    x = 644,814,370.20

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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.