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Finding the Fourth Proportional to 673.96, 1,009.51 and 309.05

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Solution

The fourth proportional to 673.96, 1,009.51 and 309.05 is: 462.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.96 : 1,009.51 = 309.05 : x
  2. Step 2: Convert to fraction form
    673.96/1,009.51 = 309.05/x
  3. Step 3: Cross multiply
    673.96x = 1,009.51 × 309.05
  4. Step 4: Simplify right side
    673.96x = 311,989.07
  5. Step 5: Solve for x
    x = 311,989.07/673.96
  6. Step 6: Final answer
    x = 462.92

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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.