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Finding the Third Proportional to 84,480 and 181,440

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Solution

The third proportional to 84,480 and 181,440 is: 389,683.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,480 : 181,440 = 181,440 : x
  2. Step 2: Convert to fraction form
    84,480/181,440 = 181,440/x
  3. Step 3: Cross multiply
    84,480x = 181,440 × 181,440
  4. Step 4: Simplify right side
    84,480x = 32,920,473,600
  5. Step 5: Solve for x
    x = 32,920,473,600/84,480
  6. Step 6: Final answer
    x = 389,683.64

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.