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Finding the Fourth Proportional to 1,028.13, 1,417.83 and 673.95

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Solution

The fourth proportional to 1,028.13, 1,417.83 and 673.95 is: 929.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.13 : 1,417.83 = 673.95 : x
  2. Step 2: Convert to fraction form
    1,028.13/1,417.83 = 673.95/x
  3. Step 3: Cross multiply
    1,028.13x = 1,417.83 × 673.95
  4. Step 4: Simplify right side
    1,028.13x = 955,546.53
  5. Step 5: Solve for x
    x = 955,546.53/1,028.13
  6. Step 6: Final answer
    x = 929.40

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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.