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Finding the Third Proportional to 286,478 and 630,144

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Solution

The third proportional to 286,478 and 630,144 is: 1,386,080.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,478 : 630,144 = 630,144 : x
  2. Step 2: Convert to fraction form
    286,478/630,144 = 630,144/x
  3. Step 3: Cross multiply
    286,478x = 630,144 × 630,144
  4. Step 4: Simplify right side
    286,478x = 397,081,460,736
  5. Step 5: Solve for x
    x = 397,081,460,736/286,478
  6. Step 6: Final answer
    x = 1,386,080.12

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.