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Finding the Fourth Proportional to 455,679.68, 683,191.04 and 278,144.96

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Solution

The fourth proportional to 455,679.68, 683,191.04 and 278,144.96 is: 417,016.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,679.68 : 683,191.04 = 278,144.96 : x
  2. Step 2: Convert to fraction form
    455,679.68/683,191.04 = 278,144.96/x
  3. Step 3: Cross multiply
    455,679.68x = 683,191.04 × 278,144.96
  4. Step 4: Simplify right side
    455,679.68x = 190,026,144,493.16
  5. Step 5: Solve for x
    x = 190,026,144,493.16/455,679.68
  6. Step 6: Final answer
    x = 417,016.94

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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.