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Finding the Third Proportional to 249,918 and 387,090

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Solution

The third proportional to 249,918 and 387,090 is: 599,551.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,918 : 387,090 = 387,090 : x
  2. Step 2: Convert to fraction form
    249,918/387,090 = 387,090/x
  3. Step 3: Cross multiply
    249,918x = 387,090 × 387,090
  4. Step 4: Simplify right side
    249,918x = 149,838,668,100
  5. Step 5: Solve for x
    x = 149,838,668,100/249,918
  6. Step 6: Final answer
    x = 599,551.33

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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.