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Finding the Fourth Proportional to 455,395.10, 682,178.96 and 418,191.80

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Solution

The fourth proportional to 455,395.10, 682,178.96 and 418,191.80 is: 626,448.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,395.10 : 682,178.96 = 418,191.80 : x
  2. Step 2: Convert to fraction form
    455,395.10/682,178.96 = 418,191.80/x
  3. Step 3: Cross multiply
    455,395.10x = 682,178.96 × 418,191.80
  4. Step 4: Simplify right side
    455,395.10x = 285,281,644,839.11
  5. Step 5: Solve for x
    x = 285,281,644,839.11/455,395.10
  6. Step 6: Final answer
    x = 626,448.66

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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.