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Finding the Fourth Proportional to 436.26, 653.56 and 393.06

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Solution

The fourth proportional to 436.26, 653.56 and 393.06 is: 588.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.26 : 653.56 = 393.06 : x
  2. Step 2: Convert to fraction form
    436.26/653.56 = 393.06/x
  3. Step 3: Cross multiply
    436.26x = 653.56 × 393.06
  4. Step 4: Simplify right side
    436.26x = 256,888.29
  5. Step 5: Solve for x
    x = 256,888.29/436.26
  6. Step 6: Final answer
    x = 588.84

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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.