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Finding the Fourth Proportional to 665,339.35, 996,860.85 and 309,623.80

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Solution

The fourth proportional to 665,339.35, 996,860.85 and 309,623.80 is: 463,901.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,339.35 : 996,860.85 = 309,623.80 : x
  2. Step 2: Convert to fraction form
    665,339.35/996,860.85 = 309,623.80/x
  3. Step 3: Cross multiply
    665,339.35x = 996,860.85 × 309,623.80
  4. Step 4: Simplify right side
    665,339.35x = 308,651,844,448.23
  5. Step 5: Solve for x
    x = 308,651,844,448.23/665,339.35
  6. Step 6: Final answer
    x = 463,901.38

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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.