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Finding the Fourth Proportional to 655.13, 904.16 and 393.23

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Solution

The fourth proportional to 655.13, 904.16 and 393.23 is: 542.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.13 : 904.16 = 393.23 : x
  2. Step 2: Convert to fraction form
    655.13/904.16 = 393.23/x
  3. Step 3: Cross multiply
    655.13x = 904.16 × 393.23
  4. Step 4: Simplify right side
    655.13x = 355,542.84
  5. Step 5: Solve for x
    x = 355,542.84/655.13
  6. Step 6: Final answer
    x = 542.71

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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.