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Finding the Fourth Proportional to 312,662.04, 431,307.22 and 190,191.88

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Solution

The fourth proportional to 312,662.04, 431,307.22 and 190,191.88 is: 262,363.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,662.04 : 431,307.22 = 190,191.88 : x
  2. Step 2: Convert to fraction form
    312,662.04/431,307.22 = 190,191.88/x
  3. Step 3: Cross multiply
    312,662.04x = 431,307.22 × 190,191.88
  4. Step 4: Simplify right side
    312,662.04x = 82,031,131,029.37
  5. Step 5: Solve for x
    x = 82,031,131,029.37/312,662.04
  6. Step 6: Final answer
    x = 262,363.58

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1.5x scale

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.