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Finding the Third Proportional to 388,455 and 915,687

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Solution

The third proportional to 388,455 and 915,687 is: 2,158,506.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,455 : 915,687 = 915,687 : x
  2. Step 2: Convert to fraction form
    388,455/915,687 = 915,687/x
  3. Step 3: Cross multiply
    388,455x = 915,687 × 915,687
  4. Step 4: Simplify right side
    388,455x = 838,482,681,969
  5. Step 5: Solve for x
    x = 838,482,681,969/388,455
  6. Step 6: Final answer
    x = 2,158,506.60

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.