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Finding the Fourth Proportional to 638,058.10, 880,559.40 and 351,578.11

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Solution

The fourth proportional to 638,058.10, 880,559.40 and 351,578.11 is: 485,199.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,058.10 : 880,559.40 = 351,578.11 : x
  2. Step 2: Convert to fraction form
    638,058.10/880,559.40 = 351,578.11/x
  3. Step 3: Cross multiply
    638,058.10x = 880,559.40 × 351,578.11
  4. Step 4: Simplify right side
    638,058.10x = 309,585,409,594.73
  5. Step 5: Solve for x
    x = 309,585,409,594.73/638,058.10
  6. Step 6: Final answer
    x = 485,199.40

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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.