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Finding the Fourth Proportional to 442,656,469.80, 663,984,704.70 and 429,901,885.80

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Solution

The fourth proportional to 442,656,469.80, 663,984,704.70 and 429,901,885.80 is: 644,852,828.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,656,469.80 : 663,984,704.70 = 429,901,885.80 : x
  2. Step 2: Convert to fraction form
    442,656,469.80/663,984,704.70 = 429,901,885.80/x
  3. Step 3: Cross multiply
    442,656,469.80x = 663,984,704.70 × 429,901,885.80
  4. Step 4: Simplify right side
    442,656,469.80x = 285,448,276,692,886,144
  5. Step 5: Solve for x
    x = 285,448,276,692,886,144/442,656,469.80
  6. Step 6: Final answer
    x = 644,852,828.70

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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.