Home / 389,849.20-584,370.60-211,980.40

Finding the Fourth Proportional to 389,849.20, 584,370.60 and 211,980.40

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Solution

The fourth proportional to 389,849.20, 584,370.60 and 211,980.40 is: 317,751.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,849.20 : 584,370.60 = 211,980.40 : x
  2. Step 2: Convert to fraction form
    389,849.20/584,370.60 = 211,980.40/x
  3. Step 3: Cross multiply
    389,849.20x = 584,370.60 × 211,980.40
  4. Step 4: Simplify right side
    389,849.20x = 123,875,113,536.24
  5. Step 5: Solve for x
    x = 123,875,113,536.24/389,849.20
  6. Step 6: Final answer
    x = 317,751.36

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1.5x scale

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.