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Finding the Fourth Proportional to 638,131.78, 880,627.77 and 351,662.14

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Solution

The fourth proportional to 638,131.78, 880,627.77 and 351,662.14 is: 485,297.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,131.78 : 880,627.77 = 351,662.14 : x
  2. Step 2: Convert to fraction form
    638,131.78/880,627.77 = 351,662.14/x
  3. Step 3: Cross multiply
    638,131.78x = 880,627.77 × 351,662.14
  4. Step 4: Simplify right side
    638,131.78x = 309,683,446,141.63
  5. Step 5: Solve for x
    x = 309,683,446,141.63/638,131.78
  6. Step 6: Final answer
    x = 485,297.01

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1.5x scale

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.