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Finding the Fourth Proportional to 219,290.63, 328,936.55 and 53,078.63

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Solution

The fourth proportional to 219,290.63, 328,936.55 and 53,078.63 is: 79,618.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,290.63 : 328,936.55 = 53,078.63 : x
  2. Step 2: Convert to fraction form
    219,290.63/328,936.55 = 53,078.63/x
  3. Step 3: Cross multiply
    219,290.63x = 328,936.55 × 53,078.63
  4. Step 4: Simplify right side
    219,290.63x = 17,459,499,520.85
  5. Step 5: Solve for x
    x = 17,459,499,520.85/219,290.63
  6. Step 6: Final answer
    x = 79,618.08

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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.