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Finding the Fourth Proportional to 389,758.67, 538,238.40 and 368,531.03

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Solution

The fourth proportional to 389,758.67, 538,238.40 and 368,531.03 is: 508,924.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,758.67 : 538,238.40 = 368,531.03 : x
  2. Step 2: Convert to fraction form
    389,758.67/538,238.40 = 368,531.03/x
  3. Step 3: Cross multiply
    389,758.67x = 538,238.40 × 368,531.03
  4. Step 4: Simplify right side
    389,758.67x = 198,357,551,937.55
  5. Step 5: Solve for x
    x = 198,357,551,937.55/389,758.67
  6. Step 6: Final answer
    x = 508,924.03

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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.