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Finding the Fourth Proportional to 690,630.39, 952,850.61 and 388,766.07

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Solution

The fourth proportional to 690,630.39, 952,850.61 and 388,766.07 is: 536,373.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,630.39 : 952,850.61 = 388,766.07 : x
  2. Step 2: Convert to fraction form
    690,630.39/952,850.61 = 388,766.07/x
  3. Step 3: Cross multiply
    690,630.39x = 952,850.61 × 388,766.07
  4. Step 4: Simplify right side
    690,630.39x = 370,435,986,946.80
  5. Step 5: Solve for x
    x = 370,435,986,946.80/690,630.39
  6. Step 6: Final answer
    x = 536,373.71

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1.5x scale

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.