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Finding the Fourth Proportional to 694.36, 1,038.46 and 617.86

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Solution

The fourth proportional to 694.36, 1,038.46 and 617.86 is: 924.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.36 : 1,038.46 = 617.86 : x
  2. Step 2: Convert to fraction form
    694.36/1,038.46 = 617.86/x
  3. Step 3: Cross multiply
    694.36x = 1,038.46 × 617.86
  4. Step 4: Simplify right side
    694.36x = 641,622.90
  5. Step 5: Solve for x
    x = 641,622.90/694.36
  6. Step 6: Final answer
    x = 924.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.