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Finding the Fourth Proportional to 455,590.20, 683,385.30 and 218,875.80

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Solution

The fourth proportional to 455,590.20, 683,385.30 and 218,875.80 is: 328,313.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,590.20 : 683,385.30 = 218,875.80 : x
  2. Step 2: Convert to fraction form
    455,590.20/683,385.30 = 218,875.80/x
  3. Step 3: Cross multiply
    455,590.20x = 683,385.30 × 218,875.80
  4. Step 4: Simplify right side
    455,590.20x = 149,576,504,245.74
  5. Step 5: Solve for x
    x = 149,576,504,245.74/455,590.20
  6. Step 6: Final answer
    x = 328,313.70

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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.