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Finding the Fourth Proportional to 1,658.36, 2,486.18 and 617.70

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Solution

The fourth proportional to 1,658.36, 2,486.18 and 617.70 is: 926.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,658.36 : 2,486.18 = 617.70 : x
  2. Step 2: Convert to fraction form
    1,658.36/2,486.18 = 617.70/x
  3. Step 3: Cross multiply
    1,658.36x = 2,486.18 × 617.70
  4. Step 4: Simplify right side
    1,658.36x = 1,535,713.39
  5. Step 5: Solve for x
    x = 1,535,713.39/1,658.36
  6. Step 6: Final answer
    x = 926.04

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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.