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Finding the Fourth Proportional to 436.84, 650.69 and 421.32

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Solution

The fourth proportional to 436.84, 650.69 and 421.32 is: 627.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.84 : 650.69 = 421.32 : x
  2. Step 2: Convert to fraction form
    436.84/650.69 = 421.32/x
  3. Step 3: Cross multiply
    436.84x = 650.69 × 421.32
  4. Step 4: Simplify right side
    436.84x = 274,148.71
  5. Step 5: Solve for x
    x = 274,148.71/436.84
  6. Step 6: Final answer
    x = 627.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.