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Finding the Fourth Proportional to 674.39, 930.47 and 453.40

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Solution

The fourth proportional to 674.39, 930.47 and 453.40 is: 625.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.39 : 930.47 = 453.40 : x
  2. Step 2: Convert to fraction form
    674.39/930.47 = 453.40/x
  3. Step 3: Cross multiply
    674.39x = 930.47 × 453.40
  4. Step 4: Simplify right side
    674.39x = 421,870.45
  5. Step 5: Solve for x
    x = 421,870.45/674.39
  6. Step 6: Final answer
    x = 625.56

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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.