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Finding the Fourth Proportional to 836,626.60, 1,257,564.30 and 820,880.20

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Solution

The fourth proportional to 836,626.60, 1,257,564.30 and 820,880.20 is: 1,233,895.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    836,626.60 : 1,257,564.30 = 820,880.20 : x
  2. Step 2: Convert to fraction form
    836,626.60/1,257,564.30 = 820,880.20/x
  3. Step 3: Cross multiply
    836,626.60x = 1,257,564.30 × 820,880.20
  4. Step 4: Simplify right side
    836,626.60x = 1,032,309,634,096.86
  5. Step 5: Solve for x
    x = 1,032,309,634,096.86/836,626.60
  6. Step 6: Final answer
    x = 1,233,895.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.