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Finding the Fourth Proportional to 1,948,608.76, 2,689,136.68 and 1,065,609.80

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Solution

The fourth proportional to 1,948,608.76, 2,689,136.68 and 1,065,609.80 is: 1,470,572.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948,608.76 : 2,689,136.68 = 1,065,609.80 : x
  2. Step 2: Convert to fraction form
    1,948,608.76/2,689,136.68 = 1,065,609.80/x
  3. Step 3: Cross multiply
    1,948,608.76x = 2,689,136.68 × 1,065,609.80
  4. Step 4: Simplify right side
    1,948,608.76x = 2,865,570,399,747.46
  5. Step 5: Solve for x
    x = 2,865,570,399,747.46/1,948,608.76
  6. Step 6: Final answer
    x = 1,470,572.47

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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.