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Finding the Fourth Proportional to 478,639.73, 660,519.45 and 263,780.03

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Solution

The fourth proportional to 478,639.73, 660,519.45 and 263,780.03 is: 364,014.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,639.73 : 660,519.45 = 263,780.03 : x
  2. Step 2: Convert to fraction form
    478,639.73/660,519.45 = 263,780.03/x
  3. Step 3: Cross multiply
    478,639.73x = 660,519.45 × 263,780.03
  4. Step 4: Simplify right side
    478,639.73x = 174,231,837,033.99
  5. Step 5: Solve for x
    x = 174,231,837,033.99/478,639.73
  6. Step 6: Final answer
    x = 364,014.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.