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Finding the Fourth Proportional to 436.47, 601.55 and 385.55

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Solution

The fourth proportional to 436.47, 601.55 and 385.55 is: 531.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.47 : 601.55 = 385.55 : x
  2. Step 2: Convert to fraction form
    436.47/601.55 = 385.55/x
  3. Step 3: Cross multiply
    436.47x = 601.55 × 385.55
  4. Step 4: Simplify right side
    436.47x = 231,930.79
  5. Step 5: Solve for x
    x = 231,930.79/436.47
  6. Step 6: Final answer
    x = 531.38

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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.