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Finding the Fourth Proportional to 399,244, 550,956.72 and 220,397.28

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Solution

The fourth proportional to 399,244, 550,956.72 and 220,397.28 is: 304,148.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,244 : 550,956.72 = 220,397.28 : x
  2. Step 2: Convert to fraction form
    399,244/550,956.72 = 220,397.28/x
  3. Step 3: Cross multiply
    399,244x = 550,956.72 × 220,397.28
  4. Step 4: Simplify right side
    399,244x = 121,429,362,485.72
  5. Step 5: Solve for x
    x = 121,429,362,485.72/399,244
  6. Step 6: Final answer
    x = 304,148.25

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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.