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Finding the Fourth Proportional to 1,174.13, 1,620.86 and 676.68

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Solution

The fourth proportional to 1,174.13, 1,620.86 and 676.68 is: 934.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.13 : 1,620.86 = 676.68 : x
  2. Step 2: Convert to fraction form
    1,174.13/1,620.86 = 676.68/x
  3. Step 3: Cross multiply
    1,174.13x = 1,620.86 × 676.68
  4. Step 4: Simplify right side
    1,174.13x = 1,096,800.16
  5. Step 5: Solve for x
    x = 1,096,800.16/1,174.13
  6. Step 6: Final answer
    x = 934.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.