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Finding the Third Proportional to 358,600 and 780,280

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Solution

The third proportional to 358,600 and 780,280 is: 1,697,816.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,600 : 780,280 = 780,280 : x
  2. Step 2: Convert to fraction form
    358,600/780,280 = 780,280/x
  3. Step 3: Cross multiply
    358,600x = 780,280 × 780,280
  4. Step 4: Simplify right side
    358,600x = 608,836,878,400
  5. Step 5: Solve for x
    x = 608,836,878,400/358,600
  6. Step 6: Final answer
    x = 1,697,816.17

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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.