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Finding the Fourth Proportional to 389,807.06, 537,933.75 and 210,959.06

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Solution

The fourth proportional to 389,807.06, 537,933.75 and 210,959.06 is: 291,123.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,807.06 : 537,933.75 = 210,959.06 : x
  2. Step 2: Convert to fraction form
    389,807.06/537,933.75 = 210,959.06/x
  3. Step 3: Cross multiply
    389,807.06x = 537,933.75 × 210,959.06
  4. Step 4: Simplify right side
    389,807.06x = 113,481,998,796.01
  5. Step 5: Solve for x
    x = 113,481,998,796.01/389,807.06
  6. Step 6: Final answer
    x = 291,123.51

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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.