Home / 690,723.20-953,194.56-388,919.36

Finding the Fourth Proportional to 690,723.20, 953,194.56 and 388,919.36

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Solution

The fourth proportional to 690,723.20, 953,194.56 and 388,919.36 is: 536,706.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,723.20 : 953,194.56 = 388,919.36 : x
  2. Step 2: Convert to fraction form
    690,723.20/953,194.56 = 388,919.36/x
  3. Step 3: Cross multiply
    690,723.20x = 953,194.56 × 388,919.36
  4. Step 4: Simplify right side
    690,723.20x = 370,715,818,230.68
  5. Step 5: Solve for x
    x = 370,715,818,230.68/690,723.20
  6. Step 6: Final answer
    x = 536,706.77

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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.