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Finding the Fourth Proportional to 389,433.82, 537,445.68 and 217,385.30

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Solution

The fourth proportional to 389,433.82, 537,445.68 and 217,385.30 is: 300,006.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,433.82 : 537,445.68 = 217,385.30 : x
  2. Step 2: Convert to fraction form
    389,433.82/537,445.68 = 217,385.30/x
  3. Step 3: Cross multiply
    389,433.82x = 537,445.68 × 217,385.30
  4. Step 4: Simplify right side
    389,433.82x = 116,832,790,380.50
  5. Step 5: Solve for x
    x = 116,832,790,380.50/389,433.82
  6. Step 6: Final answer
    x = 300,006.79

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1.5x scale

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.