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Finding the Fourth Proportional to 421.53, 580.55 and 368.88

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Solution

The fourth proportional to 421.53, 580.55 and 368.88 is: 508.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.53 : 580.55 = 368.88 : x
  2. Step 2: Convert to fraction form
    421.53/580.55 = 368.88/x
  3. Step 3: Cross multiply
    421.53x = 580.55 × 368.88
  4. Step 4: Simplify right side
    421.53x = 214,151.44
  5. Step 5: Solve for x
    x = 214,151.44/421.53
  6. Step 6: Final answer
    x = 508.03

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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.