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Finding the Fourth Proportional to 620,054.37, 855,619.23 and 361,953.72

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Solution

The fourth proportional to 620,054.37, 855,619.23 and 361,953.72 is: 499,463.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,054.37 : 855,619.23 = 361,953.72 : x
  2. Step 2: Convert to fraction form
    620,054.37/855,619.23 = 361,953.72/x
  3. Step 3: Cross multiply
    620,054.37x = 855,619.23 × 361,953.72
  4. Step 4: Simplify right side
    620,054.37x = 309,694,563,202.04
  5. Step 5: Solve for x
    x = 309,694,563,202.04/620,054.37
  6. Step 6: Final answer
    x = 499,463.56

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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.