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Finding the Fourth Proportional to 455,057.94, 626,954.40 and 317,106.84

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Solution

The fourth proportional to 455,057.94, 626,954.40 and 317,106.84 is: 436,892.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,057.94 : 626,954.40 = 317,106.84 : x
  2. Step 2: Convert to fraction form
    455,057.94/626,954.40 = 317,106.84/x
  3. Step 3: Cross multiply
    455,057.94x = 626,954.40 × 317,106.84
  4. Step 4: Simplify right side
    455,057.94x = 198,811,528,608.10
  5. Step 5: Solve for x
    x = 198,811,528,608.10/455,057.94
  6. Step 6: Final answer
    x = 436,892.78

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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.