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Finding the Fourth Proportional to 673.14, 1,008.90 and 307.43

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Solution

The fourth proportional to 673.14, 1,008.90 and 307.43 is: 460.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.14 : 1,008.90 = 307.43 : x
  2. Step 2: Convert to fraction form
    673.14/1,008.90 = 307.43/x
  3. Step 3: Cross multiply
    673.14x = 1,008.90 × 307.43
  4. Step 4: Simplify right side
    673.14x = 310,161.08
  5. Step 5: Solve for x
    x = 310,161.08/673.14
  6. Step 6: Final answer
    x = 460.77

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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.