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Finding the Fourth Proportional to 333.72, 461.70 and 275.40

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Solution

The fourth proportional to 333.72, 461.70 and 275.40 is: 381.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.72 : 461.70 = 275.40 : x
  2. Step 2: Convert to fraction form
    333.72/461.70 = 275.40/x
  3. Step 3: Cross multiply
    333.72x = 461.70 × 275.40
  4. Step 4: Simplify right side
    333.72x = 127,152.18
  5. Step 5: Solve for x
    x = 127,152.18/333.72
  6. Step 6: Final answer
    x = 381.01

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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.