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Finding the Fourth Proportional to 645,416.70, 967,995.45 and 308,456.70

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Solution

The fourth proportional to 645,416.70, 967,995.45 and 308,456.70 is: 462,623.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,416.70 : 967,995.45 = 308,456.70 : x
  2. Step 2: Convert to fraction form
    645,416.70/967,995.45 = 308,456.70/x
  3. Step 3: Cross multiply
    645,416.70x = 967,995.45 × 308,456.70
  4. Step 4: Simplify right side
    645,416.70x = 298,584,682,122.02
  5. Step 5: Solve for x
    x = 298,584,682,122.02/645,416.70
  6. Step 6: Final answer
    x = 462,623.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.