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Finding the Fourth Proportional to 673.66, 1,009.53 and 385.18

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Solution

The fourth proportional to 673.66, 1,009.53 and 385.18 is: 577.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.66 : 1,009.53 = 385.18 : x
  2. Step 2: Convert to fraction form
    673.66/1,009.53 = 385.18/x
  3. Step 3: Cross multiply
    673.66x = 1,009.53 × 385.18
  4. Step 4: Simplify right side
    673.66x = 388,850.77
  5. Step 5: Solve for x
    x = 388,850.77/673.66
  6. Step 6: Final answer
    x = 577.22

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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.