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Finding the Fourth Proportional to 425,945.79, 638,002.58 and 200,969.19

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Solution

The fourth proportional to 425,945.79, 638,002.58 and 200,969.19 is: 301,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,945.79 : 638,002.58 = 200,969.19 : x
  2. Step 2: Convert to fraction form
    425,945.79/638,002.58 = 200,969.19/x
  3. Step 3: Cross multiply
    425,945.79x = 638,002.58 × 200,969.19
  4. Step 4: Simplify right side
    425,945.79x = 128,218,860,715.66
  5. Step 5: Solve for x
    x = 128,218,860,715.66/425,945.79
  6. Step 6: Final answer
    x = 301,021.55

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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.