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Finding the Fourth Proportional to 686,568.37, 947,520.49 and 380,740.67

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Solution

The fourth proportional to 686,568.37, 947,520.49 and 380,740.67 is: 525,453.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,568.37 : 947,520.49 = 380,740.67 : x
  2. Step 2: Convert to fraction form
    686,568.37/947,520.49 = 380,740.67/x
  3. Step 3: Cross multiply
    686,568.37x = 947,520.49 × 380,740.67
  4. Step 4: Simplify right side
    686,568.37x = 360,759,586,201.33
  5. Step 5: Solve for x
    x = 360,759,586,201.33/686,568.37
  6. Step 6: Final answer
    x = 525,453.26

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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.