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Finding the Fourth Proportional to 638,109.01, 880,609.28 and 351,647.65

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Solution

The fourth proportional to 638,109.01, 880,609.28 and 351,647.65 is: 485,284.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,109.01 : 880,609.28 = 351,647.65 : x
  2. Step 2: Convert to fraction form
    638,109.01/880,609.28 = 351,647.65/x
  3. Step 3: Cross multiply
    638,109.01x = 880,609.28 × 351,647.65
  4. Step 4: Simplify right side
    638,109.01x = 309,664,183,880.19
  5. Step 5: Solve for x
    x = 309,664,183,880.19/638,109.01
  6. Step 6: Final answer
    x = 485,284.14

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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.