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Finding the Fourth Proportional to 353.60, 528.16 and 281.24

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Solution

The fourth proportional to 353.60, 528.16 and 281.24 is: 420.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.60 : 528.16 = 281.24 : x
  2. Step 2: Convert to fraction form
    353.60/528.16 = 281.24/x
  3. Step 3: Cross multiply
    353.60x = 528.16 × 281.24
  4. Step 4: Simplify right side
    353.60x = 148,539.72
  5. Step 5: Solve for x
    x = 148,539.72/353.60
  6. Step 6: Final answer
    x = 420.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.