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Finding the Fourth Proportional to 455,420.80, 683,131.20 and 322,451.20

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Solution

The fourth proportional to 455,420.80, 683,131.20 and 322,451.20 is: 483,676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,420.80 : 683,131.20 = 322,451.20 : x
  2. Step 2: Convert to fraction form
    455,420.80/683,131.20 = 322,451.20/x
  3. Step 3: Cross multiply
    455,420.80x = 683,131.20 × 322,451.20
  4. Step 4: Simplify right side
    455,420.80x = 220,276,475,197.44
  5. Step 5: Solve for x
    x = 220,276,475,197.44/455,420.80
  6. Step 6: Final answer
    x = 483,676.80

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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.