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Finding the Fourth Proportional to 389,129.59, 536,998.82 and 219,363.72

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Solution

The fourth proportional to 389,129.59, 536,998.82 and 219,363.72 is: 302,721.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,129.59 : 536,998.82 = 219,363.72 : x
  2. Step 2: Convert to fraction form
    389,129.59/536,998.82 = 219,363.72/x
  3. Step 3: Cross multiply
    389,129.59x = 536,998.82 × 219,363.72
  4. Step 4: Simplify right side
    389,129.59x = 117,798,058,790.81
  5. Step 5: Solve for x
    x = 117,798,058,790.81/389,129.59
  6. Step 6: Final answer
    x = 302,721.93

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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.