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Finding the Fourth Proportional to 640,805.59, 884,183.70 and 354,270.25

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Solution

The fourth proportional to 640,805.59, 884,183.70 and 354,270.25 is: 488,822.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,805.59 : 884,183.70 = 354,270.25 : x
  2. Step 2: Convert to fraction form
    640,805.59/884,183.70 = 354,270.25/x
  3. Step 3: Cross multiply
    640,805.59x = 884,183.70 × 354,270.25
  4. Step 4: Simplify right side
    640,805.59x = 313,239,980,444.93
  5. Step 5: Solve for x
    x = 313,239,980,444.93/640,805.59
  6. Step 6: Final answer
    x = 488,822.17

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