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Finding the Third Proportional to 290,444 and 456,430

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Solution

The third proportional to 290,444 and 456,430 is: 717,275.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,444 : 456,430 = 456,430 : x
  2. Step 2: Convert to fraction form
    290,444/456,430 = 456,430/x
  3. Step 3: Cross multiply
    290,444x = 456,430 × 456,430
  4. Step 4: Simplify right side
    290,444x = 208,328,344,900
  5. Step 5: Solve for x
    x = 208,328,344,900/290,444
  6. Step 6: Final answer
    x = 717,275.43

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.