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Finding the Fourth Proportional to 389,793.12, 537,914.40 and 210,945.12

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Solution

The fourth proportional to 389,793.12, 537,914.40 and 210,945.12 is: 291,104.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,793.12 : 537,914.40 = 210,945.12 : x
  2. Step 2: Convert to fraction form
    389,793.12/537,914.40 = 210,945.12/x
  3. Step 3: Cross multiply
    389,793.12x = 537,914.40 × 210,945.12
  4. Step 4: Simplify right side
    389,793.12x = 113,470,417,657.73
  5. Step 5: Solve for x
    x = 113,470,417,657.73/389,793.12
  6. Step 6: Final answer
    x = 291,104.21

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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.