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Finding the Fourth Proportional to 690,719.04, 953,229.60 and 388,941.12

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Solution

The fourth proportional to 690,719.04, 953,229.60 and 388,941.12 is: 536,759.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,719.04 : 953,229.60 = 388,941.12 : x
  2. Step 2: Convert to fraction form
    690,719.04/953,229.60 = 388,941.12/x
  3. Step 3: Cross multiply
    690,719.04x = 953,229.60 × 388,941.12
  4. Step 4: Simplify right side
    690,719.04x = 370,750,188,241.15
  5. Step 5: Solve for x
    x = 370,750,188,241.15/690,719.04
  6. Step 6: Final answer
    x = 536,759.76

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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.