Home / 647,355,999.90-971,033,999.85-642,821,036.70

Finding the Fourth Proportional to 647,355,999.90, 971,033,999.85 and 642,821,036.70

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Solution

The fourth proportional to 647,355,999.90, 971,033,999.85 and 642,821,036.70 is: 964,231,555.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,355,999.90 : 971,033,999.85 = 642,821,036.70 : x
  2. Step 2: Convert to fraction form
    647,355,999.90/971,033,999.85 = 642,821,036.70/x
  3. Step 3: Cross multiply
    647,355,999.90x = 971,033,999.85 × 642,821,036.70
  4. Step 4: Simplify right side
    647,355,999.90x = 624,201,082,454,524,672
  5. Step 5: Solve for x
    x = 624,201,082,454,524,672/647,355,999.90
  6. Step 6: Final answer
    x = 964,231,555.05

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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.