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Finding the Fourth Proportional to 686,100.80, 961,940.80 and 686,100.80

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Solution

The fourth proportional to 686,100.80, 961,940.80 and 686,100.80 is: 961,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,100.80 : 961,940.80 = 686,100.80 : x
  2. Step 2: Convert to fraction form
    686,100.80/961,940.80 = 686,100.80/x
  3. Step 3: Cross multiply
    686,100.80x = 961,940.80 × 686,100.80
  4. Step 4: Simplify right side
    686,100.80x = 659,988,352,432.64
  5. Step 5: Solve for x
    x = 659,988,352,432.64/686,100.80
  6. Step 6: Final answer
    x = 961,940.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.