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Finding the Third Proportional to 143,240 and 312,156

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Solution

The third proportional to 143,240 and 312,156 is: 680,266.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,240 : 312,156 = 312,156 : x
  2. Step 2: Convert to fraction form
    143,240/312,156 = 312,156/x
  3. Step 3: Cross multiply
    143,240x = 312,156 × 312,156
  4. Step 4: Simplify right side
    143,240x = 97,441,368,336
  5. Step 5: Solve for x
    x = 97,441,368,336/143,240
  6. Step 6: Final answer
    x = 680,266.46

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.