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Finding the Fourth Proportional to 459.90, 634.71 and 445.55

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Solution

The fourth proportional to 459.90, 634.71 and 445.55 is: 614.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.90 : 634.71 = 445.55 : x
  2. Step 2: Convert to fraction form
    459.90/634.71 = 445.55/x
  3. Step 3: Cross multiply
    459.90x = 634.71 × 445.55
  4. Step 4: Simplify right side
    459.90x = 282,791.87
  5. Step 5: Solve for x
    x = 282,791.87/459.90
  6. Step 6: Final answer
    x = 614.90

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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.