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Finding the Third Proportional to 178,548 and 276,639

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Solution

The third proportional to 178,548 and 276,639 is: 428,619.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,548 : 276,639 = 276,639 : x
  2. Step 2: Convert to fraction form
    178,548/276,639 = 276,639/x
  3. Step 3: Cross multiply
    178,548x = 276,639 × 276,639
  4. Step 4: Simplify right side
    178,548x = 76,529,136,321
  5. Step 5: Solve for x
    x = 76,529,136,321/178,548
  6. Step 6: Final answer
    x = 428,619.40

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.