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Finding the Fourth Proportional to 555.18, 831.57 and 359.55

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Solution

The fourth proportional to 555.18, 831.57 and 359.55 is: 538.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.18 : 831.57 = 359.55 : x
  2. Step 2: Convert to fraction form
    555.18/831.57 = 359.55/x
  3. Step 3: Cross multiply
    555.18x = 831.57 × 359.55
  4. Step 4: Simplify right side
    555.18x = 298,990.99
  5. Step 5: Solve for x
    x = 298,990.99/555.18
  6. Step 6: Final answer
    x = 538.55

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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.