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Finding the Fourth Proportional to 219,321.90, 328,982.85 and 53,109.90

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Solution

The fourth proportional to 219,321.90, 328,982.85 and 53,109.90 is: 79,664.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,321.90 : 328,982.85 = 53,109.90 : x
  2. Step 2: Convert to fraction form
    219,321.90/328,982.85 = 53,109.90/x
  3. Step 3: Cross multiply
    219,321.90x = 328,982.85 × 53,109.90
  4. Step 4: Simplify right side
    219,321.90x = 17,472,246,265.22
  5. Step 5: Solve for x
    x = 17,472,246,265.22/219,321.90
  6. Step 6: Final answer
    x = 79,664.85

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1.5x scale

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.