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Finding the Fourth Proportional to 389,611.13, 537,658.12 and 217,531.73

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Solution

The fourth proportional to 389,611.13, 537,658.12 and 217,531.73 is: 300,190.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,611.13 : 537,658.12 = 217,531.73 : x
  2. Step 2: Convert to fraction form
    389,611.13/537,658.12 = 217,531.73/x
  3. Step 3: Cross multiply
    389,611.13x = 537,658.12 × 217,531.73
  4. Step 4: Simplify right side
    389,611.13x = 116,957,698,666.17
  5. Step 5: Solve for x
    x = 116,957,698,666.17/389,611.13
  6. Step 6: Final answer
    x = 300,190.86

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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.