Home / 311,275.25-429,575.81-190,378.56

Finding the Fourth Proportional to 311,275.25, 429,575.81 and 190,378.56

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Solution

The fourth proportional to 311,275.25, 429,575.81 and 190,378.56 is: 262,732.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,275.25 : 429,575.81 = 190,378.56 : x
  2. Step 2: Convert to fraction form
    311,275.25/429,575.81 = 190,378.56/x
  3. Step 3: Cross multiply
    311,275.25x = 429,575.81 × 190,378.56
  4. Step 4: Simplify right side
    311,275.25x = 81,782,024,777.65
  5. Step 5: Solve for x
    x = 81,782,024,777.65/311,275.25
  6. Step 6: Final answer
    x = 262,732.18

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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.