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Finding the Fourth Proportional to 606,869.70, 911,288.70 and 408,071.40

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Solution

The fourth proportional to 606,869.70, 911,288.70 and 408,071.40 is: 612,768.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,869.70 : 911,288.70 = 408,071.40 : x
  2. Step 2: Convert to fraction form
    606,869.70/911,288.70 = 408,071.40/x
  3. Step 3: Cross multiply
    606,869.70x = 911,288.70 × 408,071.40
  4. Step 4: Simplify right side
    606,869.70x = 371,870,855,613.18
  5. Step 5: Solve for x
    x = 371,870,855,613.18/606,869.70
  6. Step 6: Final answer
    x = 612,768.86

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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.