Home / 686,629.30-947,358.36-396,220.66

Finding the Fourth Proportional to 686,629.30, 947,358.36 and 396,220.66

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Solution

The fourth proportional to 686,629.30, 947,358.36 and 396,220.66 is: 546,674.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,629.30 : 947,358.36 = 396,220.66 : x
  2. Step 2: Convert to fraction form
    686,629.30/947,358.36 = 396,220.66/x
  3. Step 3: Cross multiply
    686,629.30x = 947,358.36 × 396,220.66
  4. Step 4: Simplify right side
    686,629.30x = 375,362,954,655.72
  5. Step 5: Solve for x
    x = 375,362,954,655.72/686,629.30
  6. Step 6: Final answer
    x = 546,674.83

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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.