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Finding the Fourth Proportional to 445,002.56, 613,978.94 and 279,448.38

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Solution

The fourth proportional to 445,002.56, 613,978.94 and 279,448.38 is: 385,560.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,002.56 : 613,978.94 = 279,448.38 : x
  2. Step 2: Convert to fraction form
    445,002.56/613,978.94 = 279,448.38/x
  3. Step 3: Cross multiply
    445,002.56x = 613,978.94 × 279,448.38
  4. Step 4: Simplify right side
    445,002.56x = 171,575,420,835.74
  5. Step 5: Solve for x
    x = 171,575,420,835.74/445,002.56
  6. Step 6: Final answer
    x = 385,560.53

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1.5x scale

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.