Home / 354,278,509.20-488,469,987-291,334,640.40

Finding the Fourth Proportional to 354,278,509.20, 488,469,987 and 291,334,640.40

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Solution

The fourth proportional to 354,278,509.20, 488,469,987 and 291,334,640.40 is: 401,684,619.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,278,509.20 : 488,469,987 = 291,334,640.40 : x
  2. Step 2: Convert to fraction form
    354,278,509.20/488,469,987 = 291,334,640.40/x
  3. Step 3: Cross multiply
    354,278,509.20x = 488,469,987 × 291,334,640.40
  4. Step 4: Simplify right side
    354,278,509.20x = 142,308,228,008,837,664
  5. Step 5: Solve for x
    x = 142,308,228,008,837,664/354,278,509.20
  6. Step 6: Final answer
    x = 401,684,619.06

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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.