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Finding the Third Proportional to 245,619 and 390,573

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Solution

The third proportional to 245,619 and 390,573 is: 621,072.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,619 : 390,573 = 390,573 : x
  2. Step 2: Convert to fraction form
    245,619/390,573 = 390,573/x
  3. Step 3: Cross multiply
    245,619x = 390,573 × 390,573
  4. Step 4: Simplify right side
    245,619x = 152,547,268,329
  5. Step 5: Solve for x
    x = 152,547,268,329/245,619
  6. Step 6: Final answer
    x = 621,072.75

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.