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Finding the Fourth Proportional to 1,307.69, 1,960.05 and 650.03

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Solution

The fourth proportional to 1,307.69, 1,960.05 and 650.03 is: 974.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.69 : 1,960.05 = 650.03 : x
  2. Step 2: Convert to fraction form
    1,307.69/1,960.05 = 650.03/x
  3. Step 3: Cross multiply
    1,307.69x = 1,960.05 × 650.03
  4. Step 4: Simplify right side
    1,307.69x = 1,274,087.62
  5. Step 5: Solve for x
    x = 1,274,087.62/1,307.69
  6. Step 6: Final answer
    x = 974.30

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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.