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Finding the Fourth Proportional to 490,664.80, 735,997.20 and 455,235.40

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Solution

The fourth proportional to 490,664.80, 735,997.20 and 455,235.40 is: 682,853.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,664.80 : 735,997.20 = 455,235.40 : x
  2. Step 2: Convert to fraction form
    490,664.80/735,997.20 = 455,235.40/x
  3. Step 3: Cross multiply
    490,664.80x = 735,997.20 × 455,235.40
  4. Step 4: Simplify right side
    490,664.80x = 335,051,979,740.88
  5. Step 5: Solve for x
    x = 335,051,979,740.88/490,664.80
  6. Step 6: Final answer
    x = 682,853.10

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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.