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Finding the Fourth Proportional to 436.84, 654.18 and 425.16

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Solution

The fourth proportional to 436.84, 654.18 and 425.16 is: 636.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.84 : 654.18 = 425.16 : x
  2. Step 2: Convert to fraction form
    436.84/654.18 = 425.16/x
  3. Step 3: Cross multiply
    436.84x = 654.18 × 425.16
  4. Step 4: Simplify right side
    436.84x = 278,131.17
  5. Step 5: Solve for x
    x = 278,131.17/436.84
  6. Step 6: Final answer
    x = 636.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.