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Finding the Fourth Proportional to 663,619.80, 995,429.70 and 308,515.80

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Solution

The fourth proportional to 663,619.80, 995,429.70 and 308,515.80 is: 462,773.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,619.80 : 995,429.70 = 308,515.80 : x
  2. Step 2: Convert to fraction form
    663,619.80/995,429.70 = 308,515.80/x
  3. Step 3: Cross multiply
    663,619.80x = 995,429.70 × 308,515.80
  4. Step 4: Simplify right side
    663,619.80x = 307,105,790,239.26
  5. Step 5: Solve for x
    x = 307,105,790,239.26/663,619.80
  6. Step 6: Final answer
    x = 462,773.70

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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.