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Finding the Fourth Proportional to 436.88, 602.90 and 281.90

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Solution

The fourth proportional to 436.88, 602.90 and 281.90 is: 389.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.88 : 602.90 = 281.90 : x
  2. Step 2: Convert to fraction form
    436.88/602.90 = 281.90/x
  3. Step 3: Cross multiply
    436.88x = 602.90 × 281.90
  4. Step 4: Simplify right side
    436.88x = 169,953.09
  5. Step 5: Solve for x
    x = 169,953.09/436.88
  6. Step 6: Final answer
    x = 389.02

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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.