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Finding the Fourth Proportional to 399,064, 550,709.04 and 220,216

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Solution

The fourth proportional to 399,064, 550,709.04 and 220,216 is: 303,898.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,064 : 550,709.04 = 220,216 : x
  2. Step 2: Convert to fraction form
    399,064/550,709.04 = 220,216/x
  3. Step 3: Cross multiply
    399,064x = 550,709.04 × 220,216
  4. Step 4: Simplify right side
    399,064x = 121,274,941,952.64
  5. Step 5: Solve for x
    x = 121,274,941,952.64/399,064
  6. Step 6: Final answer
    x = 303,898.48

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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.