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Finding the Fourth Proportional to 606,876.70, 911,299.20 and 408,078.40

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Solution

The fourth proportional to 606,876.70, 911,299.20 and 408,078.40 is: 612,779.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,876.70 : 911,299.20 = 408,078.40 : x
  2. Step 2: Convert to fraction form
    606,876.70/911,299.20 = 408,078.40/x
  3. Step 3: Cross multiply
    606,876.70x = 911,299.20 × 408,078.40
  4. Step 4: Simplify right side
    606,876.70x = 371,881,519,457.28
  5. Step 5: Solve for x
    x = 371,881,519,457.28/606,876.70
  6. Step 6: Final answer
    x = 612,779.37

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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.