Home / 686,286.34-947,110.05-395,789.90

Finding the Fourth Proportional to 686,286.34, 947,110.05 and 395,789.90

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Solution

The fourth proportional to 686,286.34, 947,110.05 and 395,789.90 is: 546,210.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,286.34 : 947,110.05 = 395,789.90 : x
  2. Step 2: Convert to fraction form
    686,286.34/947,110.05 = 395,789.90/x
  3. Step 3: Cross multiply
    686,286.34x = 947,110.05 × 395,789.90
  4. Step 4: Simplify right side
    686,286.34x = 374,856,587,242.95
  5. Step 5: Solve for x
    x = 374,856,587,242.95/686,286.34
  6. Step 6: Final answer
    x = 546,210.18

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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.