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Finding the Fourth Proportional to 355,405.88, 532,845.46 and 215,131.32

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Solution

The fourth proportional to 355,405.88, 532,845.46 and 215,131.32 is: 322,537.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,405.88 : 532,845.46 = 215,131.32 : x
  2. Step 2: Convert to fraction form
    355,405.88/532,845.46 = 215,131.32/x
  3. Step 3: Cross multiply
    355,405.88x = 532,845.46 × 215,131.32
  4. Step 4: Simplify right side
    355,405.88x = 114,631,747,165.81
  5. Step 5: Solve for x
    x = 114,631,747,165.81/355,405.88
  6. Step 6: Final answer
    x = 322,537.57

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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.