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Finding the Fourth Proportional to 1,307.46, 1,960.32 and 674.66

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Solution

The fourth proportional to 1,307.46, 1,960.32 and 674.66 is: 1,011.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.46 : 1,960.32 = 674.66 : x
  2. Step 2: Convert to fraction form
    1,307.46/1,960.32 = 674.66/x
  3. Step 3: Cross multiply
    1,307.46x = 1,960.32 × 674.66
  4. Step 4: Simplify right side
    1,307.46x = 1,322,549.49
  5. Step 5: Solve for x
    x = 1,322,549.49/1,307.46
  6. Step 6: Final answer
    x = 1,011.54

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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.