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Finding the Fourth Proportional to 455,163.90, 627,771.07 and 291,836

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Solution

The fourth proportional to 455,163.90, 627,771.07 and 291,836 is: 402,505.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,163.90 : 627,771.07 = 291,836 : x
  2. Step 2: Convert to fraction form
    455,163.90/627,771.07 = 291,836/x
  3. Step 3: Cross multiply
    455,163.90x = 627,771.07 × 291,836
  4. Step 4: Simplify right side
    455,163.90x = 183,206,197,984.52
  5. Step 5: Solve for x
    x = 183,206,197,984.52/455,163.90
  6. Step 6: Final answer
    x = 402,505.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.