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Finding the Fourth Proportional to 389,613.70, 537,661.67 and 217,534.31

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Solution

The fourth proportional to 389,613.70, 537,661.67 and 217,534.31 is: 300,194.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,613.70 : 537,661.67 = 217,534.31 : x
  2. Step 2: Convert to fraction form
    389,613.70/537,661.67 = 217,534.31/x
  3. Step 3: Cross multiply
    389,613.70x = 537,661.67 × 217,534.31
  4. Step 4: Simplify right side
    389,613.70x = 116,959,858,252.43
  5. Step 5: Solve for x
    x = 116,959,858,252.43/389,613.70
  6. Step 6: Final answer
    x = 300,194.42

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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.