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Finding the Fourth Proportional to 673.05, 1,009.75 and 608.79

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Solution

The fourth proportional to 673.05, 1,009.75 and 608.79 is: 913.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.05 : 1,009.75 = 608.79 : x
  2. Step 2: Convert to fraction form
    673.05/1,009.75 = 608.79/x
  3. Step 3: Cross multiply
    673.05x = 1,009.75 × 608.79
  4. Step 4: Simplify right side
    673.05x = 614,725.70
  5. Step 5: Solve for x
    x = 614,725.70/673.05
  6. Step 6: Final answer
    x = 913.34

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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.