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Finding the Fourth Proportional to 332.64, 499.20 and 140.16

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Solution

The fourth proportional to 332.64, 499.20 and 140.16 is: 210.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.64 : 499.20 = 140.16 : x
  2. Step 2: Convert to fraction form
    332.64/499.20 = 140.16/x
  3. Step 3: Cross multiply
    332.64x = 499.20 × 140.16
  4. Step 4: Simplify right side
    332.64x = 69,967.87
  5. Step 5: Solve for x
    x = 69,967.87/332.64
  6. Step 6: Final answer
    x = 210.34

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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.