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Finding the Third Proportional to 310,840 and 665,784

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Solution

The third proportional to 310,840 and 665,784 is: 1,426,033.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,840 : 665,784 = 665,784 : x
  2. Step 2: Convert to fraction form
    310,840/665,784 = 665,784/x
  3. Step 3: Cross multiply
    310,840x = 665,784 × 665,784
  4. Step 4: Simplify right side
    310,840x = 443,268,334,656
  5. Step 5: Solve for x
    x = 443,268,334,656/310,840
  6. Step 6: Final answer
    x = 1,426,033.76

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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.