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Finding the Fourth Proportional to 554.42, 831.93 and 393.43

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Solution

The fourth proportional to 554.42, 831.93 and 393.43 is: 590.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.42 : 831.93 = 393.43 : x
  2. Step 2: Convert to fraction form
    554.42/831.93 = 393.43/x
  3. Step 3: Cross multiply
    554.42x = 831.93 × 393.43
  4. Step 4: Simplify right side
    554.42x = 327,306.22
  5. Step 5: Solve for x
    x = 327,306.22/554.42
  6. Step 6: Final answer
    x = 590.36

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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.