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Finding the Fourth Proportional to 673.40, 929.40 and 629.48

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Solution

The fourth proportional to 673.40, 929.40 and 629.48 is: 868.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.40 : 929.40 = 629.48 : x
  2. Step 2: Convert to fraction form
    673.40/929.40 = 629.48/x
  3. Step 3: Cross multiply
    673.40x = 929.40 × 629.48
  4. Step 4: Simplify right side
    673.40x = 585,038.71
  5. Step 5: Solve for x
    x = 585,038.71/673.40
  6. Step 6: Final answer
    x = 868.78

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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.