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Finding the Fourth Proportional to 601.83, 831.21 and 405.00

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Solution

The fourth proportional to 601.83, 831.21 and 405.00 is: 559.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.83 : 831.21 = 405.00 : x
  2. Step 2: Convert to fraction form
    601.83/831.21 = 405.00/x
  3. Step 3: Cross multiply
    601.83x = 831.21 × 405.00
  4. Step 4: Simplify right side
    601.83x = 336,636.96
  5. Step 5: Solve for x
    x = 336,636.96/601.83
  6. Step 6: Final answer
    x = 559.36

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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.