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Finding the Fourth Proportional to 389,387.52, 537,355.22 and 219,621.65

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Solution

The fourth proportional to 389,387.52, 537,355.22 and 219,621.65 is: 303,078.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,387.52 : 537,355.22 = 219,621.65 : x
  2. Step 2: Convert to fraction form
    389,387.52/537,355.22 = 219,621.65/x
  3. Step 3: Cross multiply
    389,387.52x = 537,355.22 × 219,621.65
  4. Step 4: Simplify right side
    389,387.52x = 118,014,836,267.63
  5. Step 5: Solve for x
    x = 118,014,836,267.63/389,387.52
  6. Step 6: Final answer
    x = 303,078.12

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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.