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Finding the Fourth Proportional to 365.80, 504.78 and 210.55

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Solution

The fourth proportional to 365.80, 504.78 and 210.55 is: 290.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.80 : 504.78 = 210.55 : x
  2. Step 2: Convert to fraction form
    365.80/504.78 = 210.55/x
  3. Step 3: Cross multiply
    365.80x = 504.78 × 210.55
  4. Step 4: Simplify right side
    365.80x = 106,281.43
  5. Step 5: Solve for x
    x = 106,281.43/365.80
  6. Step 6: Final answer
    x = 290.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.