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Finding the Third Proportional to 180,078 and 390,679.50

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Solution

The third proportional to 180,078 and 390,679.50 is: 847,579.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,078 : 390,679.50 = 390,679.50 : x
  2. Step 2: Convert to fraction form
    180,078/390,679.50 = 390,679.50/x
  3. Step 3: Cross multiply
    180,078x = 390,679.50 × 390,679.50
  4. Step 4: Simplify right side
    180,078x = 152,630,471,720.25
  5. Step 5: Solve for x
    x = 152,630,471,720.25/180,078
  6. Step 6: Final answer
    x = 847,579.78

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.