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Finding the Third Proportional to 577,390 and 1,390,987

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Solution

The third proportional to 577,390 and 1,390,987 is: 3,351,018.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,390 : 1,390,987 = 1,390,987 : x
  2. Step 2: Convert to fraction form
    577,390/1,390,987 = 1,390,987/x
  3. Step 3: Cross multiply
    577,390x = 1,390,987 × 1,390,987
  4. Step 4: Simplify right side
    577,390x = 1,934,844,834,169
  5. Step 5: Solve for x
    x = 1,934,844,834,169/577,390
  6. Step 6: Final answer
    x = 3,351,018.95

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Why These Related Problems?

These problems maintain the same ratio (2.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.