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Finding the Fourth Proportional to 704.79, 977.18 and 662.90

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Solution

The fourth proportional to 704.79, 977.18 and 662.90 is: 919.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.79 : 977.18 = 662.90 : x
  2. Step 2: Convert to fraction form
    704.79/977.18 = 662.90/x
  3. Step 3: Cross multiply
    704.79x = 977.18 × 662.90
  4. Step 4: Simplify right side
    704.79x = 647,764.42
  5. Step 5: Solve for x
    x = 647,764.42/704.79
  6. Step 6: Final answer
    x = 919.09

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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.