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Finding the Fourth Proportional to 1,767.60, 2,651.45 and 657.29

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Solution

The fourth proportional to 1,767.60, 2,651.45 and 657.29 is: 985.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,767.60 : 2,651.45 = 657.29 : x
  2. Step 2: Convert to fraction form
    1,767.60/2,651.45 = 657.29/x
  3. Step 3: Cross multiply
    1,767.60x = 2,651.45 × 657.29
  4. Step 4: Simplify right side
    1,767.60x = 1,742,771.57
  5. Step 5: Solve for x
    x = 1,742,771.57/1,767.60
  6. Step 6: Final answer
    x = 985.95

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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.