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Finding the Fourth Proportional to 389,363.85, 537,321.11 and 217,279.98

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Solution

The fourth proportional to 389,363.85, 537,321.11 and 217,279.98 is: 299,845.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,363.85 : 537,321.11 = 217,279.98 : x
  2. Step 2: Convert to fraction form
    389,363.85/537,321.11 = 217,279.98/x
  3. Step 3: Cross multiply
    389,363.85x = 537,321.11 × 217,279.98
  4. Step 4: Simplify right side
    389,363.85x = 116,749,120,034.38
  5. Step 5: Solve for x
    x = 116,749,120,034.38/389,363.85
  6. Step 6: Final answer
    x = 299,845.81

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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.