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Finding the Fourth Proportional to 389,893.40, 538,099.50 and 236,956.50

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Solution

The fourth proportional to 389,893.40, 538,099.50 and 236,956.50 is: 327,028.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,893.40 : 538,099.50 = 236,956.50 : x
  2. Step 2: Convert to fraction form
    389,893.40/538,099.50 = 236,956.50/x
  3. Step 3: Cross multiply
    389,893.40x = 538,099.50 × 236,956.50
  4. Step 4: Simplify right side
    389,893.40x = 127,506,174,171.75
  5. Step 5: Solve for x
    x = 127,506,174,171.75/389,893.40
  6. Step 6: Final answer
    x = 327,028.30

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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.