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Finding the Fourth Proportional to 455,401.20, 683,101.80 and 218,686.80

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Solution

The fourth proportional to 455,401.20, 683,101.80 and 218,686.80 is: 328,030.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,401.20 : 683,101.80 = 218,686.80 : x
  2. Step 2: Convert to fraction form
    455,401.20/683,101.80 = 218,686.80/x
  3. Step 3: Cross multiply
    455,401.20x = 683,101.80 × 218,686.80
  4. Step 4: Simplify right side
    455,401.20x = 149,385,346,716.24
  5. Step 5: Solve for x
    x = 149,385,346,716.24/455,401.20
  6. Step 6: Final answer
    x = 328,030.20

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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.