Home / 638,422.20-955,790.10-389,590.20

Finding the Fourth Proportional to 638,422.20, 955,790.10 and 389,590.20

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Solution

The fourth proportional to 638,422.20, 955,790.10 and 389,590.20 is: 583,260.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,422.20 : 955,790.10 = 389,590.20 : x
  2. Step 2: Convert to fraction form
    638,422.20/955,790.10 = 389,590.20/x
  3. Step 3: Cross multiply
    638,422.20x = 955,790.10 × 389,590.20
  4. Step 4: Simplify right side
    638,422.20x = 372,366,456,217.02
  5. Step 5: Solve for x
    x = 372,366,456,217.02/638,422.20
  6. Step 6: Final answer
    x = 583,260.51

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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.