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Finding the Fourth Proportional to 340,318.44, 510,438.66 and 91,019.88

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Solution

The fourth proportional to 340,318.44, 510,438.66 and 91,019.88 is: 136,519.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,318.44 : 510,438.66 = 91,019.88 : x
  2. Step 2: Convert to fraction form
    340,318.44/510,438.66 = 91,019.88/x
  3. Step 3: Cross multiply
    340,318.44x = 510,438.66 × 91,019.88
  4. Step 4: Simplify right side
    340,318.44x = 46,460,065,580.56
  5. Step 5: Solve for x
    x = 46,460,065,580.56/340,318.44
  6. Step 6: Final answer
    x = 136,519.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.