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Finding the Fourth Proportional to 333.60, 499.74 and 261.12

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Solution

The fourth proportional to 333.60, 499.74 and 261.12 is: 391.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.60 : 499.74 = 261.12 : x
  2. Step 2: Convert to fraction form
    333.60/499.74 = 261.12/x
  3. Step 3: Cross multiply
    333.60x = 499.74 × 261.12
  4. Step 4: Simplify right side
    333.60x = 130,492.11
  5. Step 5: Solve for x
    x = 130,492.11/333.60
  6. Step 6: Final answer
    x = 391.16

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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.