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Finding the Third Proportional to 319,080 and 696,120

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Solution

The third proportional to 319,080 and 696,120 is: 1,518,688.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,080 : 696,120 = 696,120 : x
  2. Step 2: Convert to fraction form
    319,080/696,120 = 696,120/x
  3. Step 3: Cross multiply
    319,080x = 696,120 × 696,120
  4. Step 4: Simplify right side
    319,080x = 484,583,054,400
  5. Step 5: Solve for x
    x = 484,583,054,400/319,080
  6. Step 6: Final answer
    x = 1,518,688.27

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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.