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Finding the Fourth Proportional to 647,408,092.80, 971,112,139.20 and 636,658,550.40

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Solution

The fourth proportional to 647,408,092.80, 971,112,139.20 and 636,658,550.40 is: 954,987,825.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,408,092.80 : 971,112,139.20 = 636,658,550.40 : x
  2. Step 2: Convert to fraction form
    647,408,092.80/971,112,139.20 = 636,658,550.40/x
  3. Step 3: Cross multiply
    647,408,092.80x = 971,112,139.20 × 636,658,550.40
  4. Step 4: Simplify right side
    647,408,092.80x = 618,266,846,818,915,072
  5. Step 5: Solve for x
    x = 618,266,846,818,915,072/647,408,092.80
  6. Step 6: Final answer
    x = 954,987,825.60

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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.