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Finding the Fourth Proportional to 673.75, 929.69 and 393.93

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Solution

The fourth proportional to 673.75, 929.69 and 393.93 is: 543.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.75 : 929.69 = 393.93 : x
  2. Step 2: Convert to fraction form
    673.75/929.69 = 393.93/x
  3. Step 3: Cross multiply
    673.75x = 929.69 × 393.93
  4. Step 4: Simplify right side
    673.75x = 366,232.78
  5. Step 5: Solve for x
    x = 366,232.78/673.75
  6. Step 6: Final answer
    x = 543.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.