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Finding the Third Proportional to 128,955 and 280,047.75

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Solution

The third proportional to 128,955 and 280,047.75 is: 608,171.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,955 : 280,047.75 = 280,047.75 : x
  2. Step 2: Convert to fraction form
    128,955/280,047.75 = 280,047.75/x
  3. Step 3: Cross multiply
    128,955x = 280,047.75 × 280,047.75
  4. Step 4: Simplify right side
    128,955x = 78,426,742,280.06
  5. Step 5: Solve for x
    x = 78,426,742,280.06/128,955
  6. Step 6: Final answer
    x = 608,171.40

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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.