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Finding the Fourth Proportional to 455,563.70, 683,345.55 and 206,245.70

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Solution

The fourth proportional to 455,563.70, 683,345.55 and 206,245.70 is: 309,368.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,563.70 : 683,345.55 = 206,245.70 : x
  2. Step 2: Convert to fraction form
    455,563.70/683,345.55 = 206,245.70/x
  3. Step 3: Cross multiply
    455,563.70x = 683,345.55 × 206,245.70
  4. Step 4: Simplify right side
    455,563.70x = 140,937,081,301.64
  5. Step 5: Solve for x
    x = 140,937,081,301.64/455,563.70
  6. Step 6: Final answer
    x = 309,368.55

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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.