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Finding the Fourth Proportional to 621,063.59, 930,930.98 and 321,242.31

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Solution

The fourth proportional to 621,063.59, 930,930.98 and 321,242.31 is: 481,519.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,063.59 : 930,930.98 = 321,242.31 : x
  2. Step 2: Convert to fraction form
    621,063.59/930,930.98 = 321,242.31/x
  3. Step 3: Cross multiply
    621,063.59x = 930,930.98 × 321,242.31
  4. Step 4: Simplify right side
    621,063.59x = 299,054,416,859.55
  5. Step 5: Solve for x
    x = 299,054,416,859.55/621,063.59
  6. Step 6: Final answer
    x = 481,519.81

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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.