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Finding the Fourth Proportional to 485,380.67, 728,136.63 and 455,856.17

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Solution

The fourth proportional to 485,380.67, 728,136.63 and 455,856.17 is: 683,845.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,380.67 : 728,136.63 = 455,856.17 : x
  2. Step 2: Convert to fraction form
    485,380.67/728,136.63 = 455,856.17/x
  3. Step 3: Cross multiply
    485,380.67x = 728,136.63 × 455,856.17
  4. Step 4: Simplify right side
    485,380.67x = 331,925,571,747.82
  5. Step 5: Solve for x
    x = 331,925,571,747.82/485,380.67
  6. Step 6: Final answer
    x = 683,845.89

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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.