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Finding the Third Proportional to 311,437.50 and 431,428.50

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Solution

The third proportional to 311,437.50 and 431,428.50 is: 597,649.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,437.50 : 431,428.50 = 431,428.50 : x
  2. Step 2: Convert to fraction form
    311,437.50/431,428.50 = 431,428.50/x
  3. Step 3: Cross multiply
    311,437.50x = 431,428.50 × 431,428.50
  4. Step 4: Simplify right side
    311,437.50x = 186,130,550,612.25
  5. Step 5: Solve for x
    x = 186,130,550,612.25/311,437.50
  6. Step 6: Final answer
    x = 597,649.77

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.