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Finding the Fourth Proportional to 1,307.70, 1,961.55 and 333.87

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Solution

The fourth proportional to 1,307.70, 1,961.55 and 333.87 is: 500.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.70 : 1,961.55 = 333.87 : x
  2. Step 2: Convert to fraction form
    1,307.70/1,961.55 = 333.87/x
  3. Step 3: Cross multiply
    1,307.70x = 1,961.55 × 333.87
  4. Step 4: Simplify right side
    1,307.70x = 654,902.70
  5. Step 5: Solve for x
    x = 654,902.70/1,307.70
  6. Step 6: Final answer
    x = 500.81

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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.