Home / 389,675.20-584,109.60-211,806.40

Finding the Fourth Proportional to 389,675.20, 584,109.60 and 211,806.40

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Solution

The fourth proportional to 389,675.20, 584,109.60 and 211,806.40 is: 317,490.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,675.20 : 584,109.60 = 211,806.40 : x
  2. Step 2: Convert to fraction form
    389,675.20/584,109.60 = 211,806.40/x
  3. Step 3: Cross multiply
    389,675.20x = 584,109.60 × 211,806.40
  4. Step 4: Simplify right side
    389,675.20x = 123,718,151,581.44
  5. Step 5: Solve for x
    x = 123,718,151,581.44/389,675.20
  6. Step 6: Final answer
    x = 317,490.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.