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Finding the Fourth Proportional to 1,784,834.69, 2,678,315.79 and 647,685.60

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Solution

The fourth proportional to 1,784,834.69, 2,678,315.79 and 647,685.60 is: 971,914.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,784,834.69 : 2,678,315.79 = 647,685.60 : x
  2. Step 2: Convert to fraction form
    1,784,834.69/2,678,315.79 = 647,685.60/x
  3. Step 3: Cross multiply
    1,784,834.69x = 2,678,315.79 × 647,685.60
  4. Step 4: Simplify right side
    1,784,834.69x = 1,734,706,569,435.62
  5. Step 5: Solve for x
    x = 1,734,706,569,435.62/1,784,834.69
  6. Step 6: Final answer
    x = 971,914.42

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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.