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Finding the Fourth Proportional to 667.99, 921.87 and 373.30

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Solution

The fourth proportional to 667.99, 921.87 and 373.30 is: 515.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.99 : 921.87 = 373.30 : x
  2. Step 2: Convert to fraction form
    667.99/921.87 = 373.30/x
  3. Step 3: Cross multiply
    667.99x = 921.87 × 373.30
  4. Step 4: Simplify right side
    667.99x = 344,134.07
  5. Step 5: Solve for x
    x = 344,134.07/667.99
  6. Step 6: Final answer
    x = 515.18

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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.