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Finding the Fourth Proportional to 436.38, 601.86 and 389.53

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Solution

The fourth proportional to 436.38, 601.86 and 389.53 is: 537.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.38 : 601.86 = 389.53 : x
  2. Step 2: Convert to fraction form
    436.38/601.86 = 389.53/x
  3. Step 3: Cross multiply
    436.38x = 601.86 × 389.53
  4. Step 4: Simplify right side
    436.38x = 234,442.53
  5. Step 5: Solve for x
    x = 234,442.53/436.38
  6. Step 6: Final answer
    x = 537.24

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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.