Home / 686,106.92-947,289.60-428,376.26

Finding the Fourth Proportional to 686,106.92, 947,289.60 and 428,376.26

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Solution

The fourth proportional to 686,106.92, 947,289.60 and 428,376.26 is: 591,447.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,106.92 : 947,289.60 = 428,376.26 : x
  2. Step 2: Convert to fraction form
    686,106.92/947,289.60 = 428,376.26/x
  3. Step 3: Cross multiply
    686,106.92x = 947,289.60 × 428,376.26
  4. Step 4: Simplify right side
    686,106.92x = 405,796,375,984.90
  5. Step 5: Solve for x
    x = 405,796,375,984.90/686,106.92
  6. Step 6: Final answer
    x = 591,447.72

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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.