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Finding the Fourth Proportional to 403.13, 603.75 and 395.57

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Solution

The fourth proportional to 403.13, 603.75 and 395.57 is: 592.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.13 : 603.75 = 395.57 : x
  2. Step 2: Convert to fraction form
    403.13/603.75 = 395.57/x
  3. Step 3: Cross multiply
    403.13x = 603.75 × 395.57
  4. Step 4: Simplify right side
    403.13x = 238,825.39
  5. Step 5: Solve for x
    x = 238,825.39/403.13
  6. Step 6: Final answer
    x = 592.43

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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.