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Finding the Third Proportional to 1,290,990.66 and 1,897,119.98

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Solution

The third proportional to 1,290,990.66 and 1,897,119.98 is: 2,787,831.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,990.66 : 1,897,119.98 = 1,897,119.98 : x
  2. Step 2: Convert to fraction form
    1,290,990.66/1,897,119.98 = 1,897,119.98/x
  3. Step 3: Cross multiply
    1,290,990.66x = 1,897,119.98 × 1,897,119.98
  4. Step 4: Simplify right side
    1,290,990.66x = 3,599,064,235,115
  5. Step 5: Solve for x
    x = 3,599,064,235,115/1,290,990.66
  6. Step 6: Final answer
    x = 2,787,831.36

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.