Home / 645,205,209,215.85-890,378,659,234.90-352,230,132,028.05

Finding the Fourth Proportional to 645,205,209,215.85, 890,378,659,234.90 and 352,230,132,028.05

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Solution

The fourth proportional to 645,205,209,215.85, 890,378,659,234.90 and 352,230,132,028.05 is: 486,075,109,465.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,205,209,215.85 : 890,378,659,234.90 = 352,230,132,028.05 : x
  2. Step 2: Convert to fraction form
    645,205,209,215.85/890,378,659,234.90 = 352,230,132,028.05/x
  3. Step 3: Cross multiply
    645,205,209,215.85x = 890,378,659,234.90 × 352,230,132,028.05
  4. Step 4: Simplify right side
    645,205,209,215.85x = 313,618,192,697,266,970,558,464
  5. Step 5: Solve for x
    x = 313,618,192,697,266,970,558,464/645,205,209,215.85
  6. Step 6: Final answer
    x = 486,075,109,465.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.