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Finding the Fourth Proportional to 620,453.76, 930,789.84 and 320,852.88

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Solution

The fourth proportional to 620,453.76, 930,789.84 and 320,852.88 is: 481,335.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,453.76 : 930,789.84 = 320,852.88 : x
  2. Step 2: Convert to fraction form
    620,453.76/930,789.84 = 320,852.88/x
  3. Step 3: Cross multiply
    620,453.76x = 930,789.84 × 320,852.88
  4. Step 4: Simplify right side
    620,453.76x = 298,646,600,838.74
  5. Step 5: Solve for x
    x = 298,646,600,838.74/620,453.76
  6. Step 6: Final answer
    x = 481,335.79

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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.