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Finding the Fourth Proportional to 388,830.96, 536,571.48 and 219,099.12

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Solution

The fourth proportional to 388,830.96, 536,571.48 and 219,099.12 is: 302,348.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,830.96 : 536,571.48 = 219,099.12 : x
  2. Step 2: Convert to fraction form
    388,830.96/536,571.48 = 219,099.12/x
  3. Step 3: Cross multiply
    388,830.96x = 536,571.48 × 219,099.12
  4. Step 4: Simplify right side
    388,830.96x = 117,562,339,085.10
  5. Step 5: Solve for x
    x = 117,562,339,085.10/388,830.96
  6. Step 6: Final answer
    x = 302,348.20

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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.