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Finding the Fourth Proportional to 436.73, 602.98 and 389.95

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Solution

The fourth proportional to 436.73, 602.98 and 389.95 is: 538.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.73 : 602.98 = 389.95 : x
  2. Step 2: Convert to fraction form
    436.73/602.98 = 389.95/x
  3. Step 3: Cross multiply
    436.73x = 602.98 × 389.95
  4. Step 4: Simplify right side
    436.73x = 235,129.57
  5. Step 5: Solve for x
    x = 235,129.57/436.73
  6. Step 6: Final answer
    x = 538.39

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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.