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Finding the Third Proportional to 155,431 and 278,879

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Solution

The third proportional to 155,431 and 278,879 is: 500,373.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,431 : 278,879 = 278,879 : x
  2. Step 2: Convert to fraction form
    155,431/278,879 = 278,879/x
  3. Step 3: Cross multiply
    155,431x = 278,879 × 278,879
  4. Step 4: Simplify right side
    155,431x = 77,773,496,641
  5. Step 5: Solve for x
    x = 77,773,496,641/155,431
  6. Step 6: Final answer
    x = 500,373.13

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.