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Finding the Fourth Proportional to 429,335,077.20, 644,002,615.80 and 429,335,077.20

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Solution

The fourth proportional to 429,335,077.20, 644,002,615.80 and 429,335,077.20 is: 644,002,615.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,335,077.20 : 644,002,615.80 = 429,335,077.20 : x
  2. Step 2: Convert to fraction form
    429,335,077.20/644,002,615.80 = 429,335,077.20/x
  3. Step 3: Cross multiply
    429,335,077.20x = 644,002,615.80 × 429,335,077.20
  4. Step 4: Simplify right side
    429,335,077.20x = 276,492,912,771,494,912
  5. Step 5: Solve for x
    x = 276,492,912,771,494,912/429,335,077.20
  6. Step 6: Final answer
    x = 644,002,615.80

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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.