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Finding the Fourth Proportional to 555.10, 831.28 and 349.16

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Solution

The fourth proportional to 555.10, 831.28 and 349.16 is: 522.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.10 : 831.28 = 349.16 : x
  2. Step 2: Convert to fraction form
    555.10/831.28 = 349.16/x
  3. Step 3: Cross multiply
    555.10x = 831.28 × 349.16
  4. Step 4: Simplify right side
    555.10x = 290,245.57
  5. Step 5: Solve for x
    x = 290,245.57/555.10
  6. Step 6: Final answer
    x = 522.87

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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.