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Finding the Third Proportional to 286,816 and 420,064

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Solution

The third proportional to 286,816 and 420,064 is: 615,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,816 : 420,064 = 420,064 : x
  2. Step 2: Convert to fraction form
    286,816/420,064 = 420,064/x
  3. Step 3: Cross multiply
    286,816x = 420,064 × 420,064
  4. Step 4: Simplify right side
    286,816x = 176,453,764,096
  5. Step 5: Solve for x
    x = 176,453,764,096/286,816
  6. Step 6: Final answer
    x = 615,215.90

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.