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Finding the Fourth Proportional to 555.20, 831.66 and 372.68

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Solution

The fourth proportional to 555.20, 831.66 and 372.68 is: 558.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.20 : 831.66 = 372.68 : x
  2. Step 2: Convert to fraction form
    555.20/831.66 = 372.68/x
  3. Step 3: Cross multiply
    555.20x = 831.66 × 372.68
  4. Step 4: Simplify right side
    555.20x = 309,943.05
  5. Step 5: Solve for x
    x = 309,943.05/555.20
  6. Step 6: Final answer
    x = 558.25

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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.