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Finding the Fourth Proportional to 1,758.40, 2,636.70 and 662.20

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Solution

The fourth proportional to 1,758.40, 2,636.70 and 662.20 is: 992.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,758.40 : 2,636.70 = 662.20 : x
  2. Step 2: Convert to fraction form
    1,758.40/2,636.70 = 662.20/x
  3. Step 3: Cross multiply
    1,758.40x = 2,636.70 × 662.20
  4. Step 4: Simplify right side
    1,758.40x = 1,746,022.74
  5. Step 5: Solve for x
    x = 1,746,022.74/1,758.40
  6. Step 6: Final answer
    x = 992.96

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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.