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Finding the Fourth Proportional to 455,954.80, 628,891.29 and 320,019.08

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Solution

The fourth proportional to 455,954.80, 628,891.29 and 320,019.08 is: 441,397.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,954.80 : 628,891.29 = 320,019.08 : x
  2. Step 2: Convert to fraction form
    455,954.80/628,891.29 = 320,019.08/x
  3. Step 3: Cross multiply
    455,954.80x = 628,891.29 × 320,019.08
  4. Step 4: Simplify right side
    455,954.80x = 201,257,208,901.36
  5. Step 5: Solve for x
    x = 201,257,208,901.36/455,954.80
  6. Step 6: Final answer
    x = 441,397.29

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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.