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Finding the Fourth Proportional to 1,357.76, 2,035.60 and 626.81

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Solution

The fourth proportional to 1,357.76, 2,035.60 and 626.81 is: 939.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.76 : 2,035.60 = 626.81 : x
  2. Step 2: Convert to fraction form
    1,357.76/2,035.60 = 626.81/x
  3. Step 3: Cross multiply
    1,357.76x = 2,035.60 × 626.81
  4. Step 4: Simplify right side
    1,357.76x = 1,275,922.69
  5. Step 5: Solve for x
    x = 1,275,922.69/1,357.76
  6. Step 6: Final answer
    x = 939.72

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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.