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Finding the Third Proportional to 307,915 and 719,428

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Solution

The third proportional to 307,915 and 719,428 is: 1,680,907.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,915 : 719,428 = 719,428 : x
  2. Step 2: Convert to fraction form
    307,915/719,428 = 719,428/x
  3. Step 3: Cross multiply
    307,915x = 719,428 × 719,428
  4. Step 4: Simplify right side
    307,915x = 517,576,647,184
  5. Step 5: Solve for x
    x = 517,576,647,184/307,915
  6. Step 6: Final answer
    x = 1,680,907.55

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.