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Finding the Fourth Proportional to 555.06, 835.44 and 418.80

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Solution

The fourth proportional to 555.06, 835.44 and 418.80 is: 630.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.06 : 835.44 = 418.80 : x
  2. Step 2: Convert to fraction form
    555.06/835.44 = 418.80/x
  3. Step 3: Cross multiply
    555.06x = 835.44 × 418.80
  4. Step 4: Simplify right side
    555.06x = 349,882.27
  5. Step 5: Solve for x
    x = 349,882.27/555.06
  6. Step 6: Final answer
    x = 630.35

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.