Home / 639,835.22-959,430.72-213,219.92

Finding the Fourth Proportional to 639,835.22, 959,430.72 and 213,219.92

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Solution

The fourth proportional to 639,835.22, 959,430.72 and 213,219.92 is: 319,722.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,835.22 : 959,430.72 = 213,219.92 : x
  2. Step 2: Convert to fraction form
    639,835.22/959,430.72 = 213,219.92/x
  3. Step 3: Cross multiply
    639,835.22x = 959,430.72 × 213,219.92
  4. Step 4: Simplify right side
    639,835.22x = 204,569,741,363.94
  5. Step 5: Solve for x
    x = 204,569,741,363.94/639,835.22
  6. Step 6: Final answer
    x = 319,722.54

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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.