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Finding the Third Proportional to 616,838 and 920,138

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Solution

The third proportional to 616,838 and 920,138 is: 1,372,570.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,838 : 920,138 = 920,138 : x
  2. Step 2: Convert to fraction form
    616,838/920,138 = 920,138/x
  3. Step 3: Cross multiply
    616,838x = 920,138 × 920,138
  4. Step 4: Simplify right side
    616,838x = 846,653,939,044
  5. Step 5: Solve for x
    x = 846,653,939,044/616,838
  6. Step 6: Final answer
    x = 1,372,570.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.