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Finding the Fourth Proportional to 601.98, 831.06 and 405.84

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Solution

The fourth proportional to 601.98, 831.06 and 405.84 is: 560.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.98 : 831.06 = 405.84 : x
  2. Step 2: Convert to fraction form
    601.98/831.06 = 405.84/x
  3. Step 3: Cross multiply
    601.98x = 831.06 × 405.84
  4. Step 4: Simplify right side
    601.98x = 337,277.39
  5. Step 5: Solve for x
    x = 337,277.39/601.98
  6. Step 6: Final answer
    x = 560.28

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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.