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Finding the Third Proportional to 917,880 and 1,988,280

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Solution

The third proportional to 917,880 and 1,988,280 is: 4,306,943.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,880 : 1,988,280 = 1,988,280 : x
  2. Step 2: Convert to fraction form
    917,880/1,988,280 = 1,988,280/x
  3. Step 3: Cross multiply
    917,880x = 1,988,280 × 1,988,280
  4. Step 4: Simplify right side
    917,880x = 3,953,257,358,400
  5. Step 5: Solve for x
    x = 3,953,257,358,400/917,880
  6. Step 6: Final answer
    x = 4,306,943.56

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.