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Finding the Fourth Proportional to 389,043, 536,879.34 and 210,195

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Solution

The fourth proportional to 389,043, 536,879.34 and 210,195 is: 290,069.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,043 : 536,879.34 = 210,195 : x
  2. Step 2: Convert to fraction form
    389,043/536,879.34 = 210,195/x
  3. Step 3: Cross multiply
    389,043x = 536,879.34 × 210,195
  4. Step 4: Simplify right side
    389,043x = 112,849,352,871.30
  5. Step 5: Solve for x
    x = 112,849,352,871.30/389,043
  6. Step 6: Final answer
    x = 290,069.10

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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.