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Finding the Fourth Proportional to 485,722.32, 670,357.62 and 279,055.32

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Solution

The fourth proportional to 485,722.32, 670,357.62 and 279,055.32 is: 385,131.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,722.32 : 670,357.62 = 279,055.32 : x
  2. Step 2: Convert to fraction form
    485,722.32/670,357.62 = 279,055.32/x
  3. Step 3: Cross multiply
    485,722.32x = 670,357.62 × 279,055.32
  4. Step 4: Simplify right side
    485,722.32x = 187,066,860,163.54
  5. Step 5: Solve for x
    x = 187,066,860,163.54/485,722.32
  6. Step 6: Final answer
    x = 385,131.28

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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.