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Finding the Fourth Proportional to 688.05, 949.37 and 436.06

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Solution

The fourth proportional to 688.05, 949.37 and 436.06 is: 601.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.05 : 949.37 = 436.06 : x
  2. Step 2: Convert to fraction form
    688.05/949.37 = 436.06/x
  3. Step 3: Cross multiply
    688.05x = 949.37 × 436.06
  4. Step 4: Simplify right side
    688.05x = 413,975.36
  5. Step 5: Solve for x
    x = 413,975.36/688.05
  6. Step 6: Final answer
    x = 601.66

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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.