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Finding the Third Proportional to 249,276 and 386,719

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Solution

The third proportional to 249,276 and 386,719 is: 599,943.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,276 : 386,719 = 386,719 : x
  2. Step 2: Convert to fraction form
    249,276/386,719 = 386,719/x
  3. Step 3: Cross multiply
    249,276x = 386,719 × 386,719
  4. Step 4: Simplify right side
    249,276x = 149,551,584,961
  5. Step 5: Solve for x
    x = 149,551,584,961/249,276
  6. Step 6: Final answer
    x = 599,943.78

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.