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Finding the Fourth Proportional to 673.93, 1,009.28 and 384.49

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Solution

The fourth proportional to 673.93, 1,009.28 and 384.49 is: 575.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.93 : 1,009.28 = 384.49 : x
  2. Step 2: Convert to fraction form
    673.93/1,009.28 = 384.49/x
  3. Step 3: Cross multiply
    673.93x = 1,009.28 × 384.49
  4. Step 4: Simplify right side
    673.93x = 388,056.14
  5. Step 5: Solve for x
    x = 388,056.14/673.93
  6. Step 6: Final answer
    x = 575.81

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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.