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Finding the Fourth Proportional to 340,392.78, 510,588.36 and 91,074.78

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Solution

The fourth proportional to 340,392.78, 510,588.36 and 91,074.78 is: 136,611.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,392.78 : 510,588.36 = 91,074.78 : x
  2. Step 2: Convert to fraction form
    340,392.78/510,588.36 = 91,074.78/x
  3. Step 3: Cross multiply
    340,392.78x = 510,588.36 × 91,074.78
  4. Step 4: Simplify right side
    340,392.78x = 46,501,722,557.56
  5. Step 5: Solve for x
    x = 46,501,722,557.56/340,392.78
  6. Step 6: Final answer
    x = 136,611.95

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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.