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Finding the Third Proportional to 144,220 and 215,130

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Solution

The third proportional to 144,220 and 215,130 is: 320,904.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,220 : 215,130 = 215,130 : x
  2. Step 2: Convert to fraction form
    144,220/215,130 = 215,130/x
  3. Step 3: Cross multiply
    144,220x = 215,130 × 215,130
  4. Step 4: Simplify right side
    144,220x = 46,280,916,900
  5. Step 5: Solve for x
    x = 46,280,916,900/144,220
  6. Step 6: Final answer
    x = 320,904.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.