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Finding the Fourth Proportional to 674.72, 930.64 and 619.64

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Solution

The fourth proportional to 674.72, 930.64 and 619.64 is: 854.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.72 : 930.64 = 619.64 : x
  2. Step 2: Convert to fraction form
    674.72/930.64 = 619.64/x
  3. Step 3: Cross multiply
    674.72x = 930.64 × 619.64
  4. Step 4: Simplify right side
    674.72x = 576,661.77
  5. Step 5: Solve for x
    x = 576,661.77/674.72
  6. Step 6: Final answer
    x = 854.67

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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.