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Finding the Third Proportional to 147,840 and 316,128

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Solution

The third proportional to 147,840 and 316,128 is: 675,980.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,840 : 316,128 = 316,128 : x
  2. Step 2: Convert to fraction form
    147,840/316,128 = 316,128/x
  3. Step 3: Cross multiply
    147,840x = 316,128 × 316,128
  4. Step 4: Simplify right side
    147,840x = 99,936,912,384
  5. Step 5: Solve for x
    x = 99,936,912,384/147,840
  6. Step 6: Final answer
    x = 675,980.20

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.