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Finding the Fourth Proportional to 673.98, 1,011.17 and 455.48

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Solution

The fourth proportional to 673.98, 1,011.17 and 455.48 is: 683.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.98 : 1,011.17 = 455.48 : x
  2. Step 2: Convert to fraction form
    673.98/1,011.17 = 455.48/x
  3. Step 3: Cross multiply
    673.98x = 1,011.17 × 455.48
  4. Step 4: Simplify right side
    673.98x = 460,560.38
  5. Step 5: Solve for x
    x = 460,560.38/673.98
  6. Step 6: Final answer
    x = 683.34

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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.