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Finding the Fourth Proportional to 219,215.80, 328,856.55 and 92,855.80

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Solution

The fourth proportional to 219,215.80, 328,856.55 and 92,855.80 is: 139,297.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,215.80 : 328,856.55 = 92,855.80 : x
  2. Step 2: Convert to fraction form
    219,215.80/328,856.55 = 92,855.80/x
  3. Step 3: Cross multiply
    219,215.80x = 328,856.55 × 92,855.80
  4. Step 4: Simplify right side
    219,215.80x = 30,536,238,035.49
  5. Step 5: Solve for x
    x = 30,536,238,035.49/219,215.80
  6. Step 6: Final answer
    x = 139,297.61

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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.