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Finding the Fourth Proportional to 667.77, 921.48 and 373.07

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Solution

The fourth proportional to 667.77, 921.48 and 373.07 is: 514.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.77 : 921.48 = 373.07 : x
  2. Step 2: Convert to fraction form
    667.77/921.48 = 373.07/x
  3. Step 3: Cross multiply
    667.77x = 921.48 × 373.07
  4. Step 4: Simplify right side
    667.77x = 343,771.94
  5. Step 5: Solve for x
    x = 343,771.94/667.77
  6. Step 6: Final answer
    x = 514.81

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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.