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Finding the Fourth Proportional to 555.52, 831.90 and 281.74

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Solution

The fourth proportional to 555.52, 831.90 and 281.74 is: 421.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.52 : 831.90 = 281.74 : x
  2. Step 2: Convert to fraction form
    555.52/831.90 = 281.74/x
  3. Step 3: Cross multiply
    555.52x = 831.90 × 281.74
  4. Step 4: Simplify right side
    555.52x = 234,379.51
  5. Step 5: Solve for x
    x = 234,379.51/555.52
  6. Step 6: Final answer
    x = 421.91

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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.