Home / 1,319,090.80-1,978,636.20-321,818.80

Finding the Fourth Proportional to 1,319,090.80, 1,978,636.20 and 321,818.80

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Solution

The fourth proportional to 1,319,090.80, 1,978,636.20 and 321,818.80 is: 482,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,090.80 : 1,978,636.20 = 321,818.80 : x
  2. Step 2: Convert to fraction form
    1,319,090.80/1,978,636.20 = 321,818.80/x
  3. Step 3: Cross multiply
    1,319,090.80x = 1,978,636.20 × 321,818.80
  4. Step 4: Simplify right side
    1,319,090.80x = 636,762,327,520.56
  5. Step 5: Solve for x
    x = 636,762,327,520.56/1,319,090.80
  6. Step 6: Final answer
    x = 482,728.20

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Similar ratio
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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.