Home / 639,074.40-957,445.20-389,464.80

Finding the Fourth Proportional to 639,074.40, 957,445.20 and 389,464.80

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Solution

The fourth proportional to 639,074.40, 957,445.20 and 389,464.80 is: 583,486.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,074.40 : 957,445.20 = 389,464.80 : x
  2. Step 2: Convert to fraction form
    639,074.40/957,445.20 = 389,464.80/x
  3. Step 3: Cross multiply
    639,074.40x = 957,445.20 × 389,464.80
  4. Step 4: Simplify right side
    639,074.40x = 372,891,203,328.96
  5. Step 5: Solve for x
    x = 372,891,203,328.96/639,074.40
  6. Step 6: Final answer
    x = 583,486.37

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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.