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Finding the Third Proportional to 245,895.75 and 390,997.13

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Solution

The third proportional to 245,895.75 and 390,997.13 is: 621,721.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,895.75 : 390,997.13 = 390,997.13 : x
  2. Step 2: Convert to fraction form
    245,895.75/390,997.13 = 390,997.13/x
  3. Step 3: Cross multiply
    245,895.75x = 390,997.13 × 390,997.13
  4. Step 4: Simplify right side
    245,895.75x = 152,878,751,758.27
  5. Step 5: Solve for x
    x = 152,878,751,758.27/245,895.75
  6. Step 6: Final answer
    x = 621,721.81

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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.