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Finding the Third Proportional to 290,479 and 440,065.50

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Solution

The third proportional to 290,479 and 440,065.50 is: 666,683.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,479 : 440,065.50 = 440,065.50 : x
  2. Step 2: Convert to fraction form
    290,479/440,065.50 = 440,065.50/x
  3. Step 3: Cross multiply
    290,479x = 440,065.50 × 440,065.50
  4. Step 4: Simplify right side
    290,479x = 193,657,644,290.25
  5. Step 5: Solve for x
    x = 193,657,644,290.25/290,479
  6. Step 6: Final answer
    x = 666,683.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.