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Finding the Fourth Proportional to 455,958.10, 629,298.72 and 308,716.18

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Solution

The fourth proportional to 455,958.10, 629,298.72 and 308,716.18 is: 426,080.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,958.10 : 629,298.72 = 308,716.18 : x
  2. Step 2: Convert to fraction form
    455,958.10/629,298.72 = 308,716.18/x
  3. Step 3: Cross multiply
    455,958.10x = 629,298.72 × 308,716.18
  4. Step 4: Simplify right side
    455,958.10x = 194,274,696,917.29
  5. Step 5: Solve for x
    x = 194,274,696,917.29/455,958.10
  6. Step 6: Final answer
    x = 426,080.15

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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.