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Finding the Fourth Proportional to 389,985, 584,903.52 and 190,104.36

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Solution

The fourth proportional to 389,985, 584,903.52 and 190,104.36 is: 285,120.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,985 : 584,903.52 = 190,104.36 : x
  2. Step 2: Convert to fraction form
    389,985/584,903.52 = 190,104.36/x
  3. Step 3: Cross multiply
    389,985x = 584,903.52 × 190,104.36
  4. Step 4: Simplify right side
    389,985x = 111,192,709,331.35
  5. Step 5: Solve for x
    x = 111,192,709,331.35/389,985
  6. Step 6: Final answer
    x = 285,120.48

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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.