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Finding the Fourth Proportional to 673.88, 933.92 and 663.62

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Solution

The fourth proportional to 673.88, 933.92 and 663.62 is: 919.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.88 : 933.92 = 663.62 : x
  2. Step 2: Convert to fraction form
    673.88/933.92 = 663.62/x
  3. Step 3: Cross multiply
    673.88x = 933.92 × 663.62
  4. Step 4: Simplify right side
    673.88x = 619,767.99
  5. Step 5: Solve for x
    x = 619,767.99/673.88
  6. Step 6: Final answer
    x = 919.70

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.