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Finding the Fourth Proportional to 651.88, 979.26 and 436.60

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Solution

The fourth proportional to 651.88, 979.26 and 436.60 is: 655.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.88 : 979.26 = 436.60 : x
  2. Step 2: Convert to fraction form
    651.88/979.26 = 436.60/x
  3. Step 3: Cross multiply
    651.88x = 979.26 × 436.60
  4. Step 4: Simplify right side
    651.88x = 427,544.92
  5. Step 5: Solve for x
    x = 427,544.92/651.88
  6. Step 6: Final answer
    x = 655.86

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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.