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Finding the Fourth Proportional to 1,028.96, 1,419.84 and 587

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Solution

The fourth proportional to 1,028.96, 1,419.84 and 587 is: 809.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.96 : 1,419.84 = 587 : x
  2. Step 2: Convert to fraction form
    1,028.96/1,419.84 = 587/x
  3. Step 3: Cross multiply
    1,028.96x = 1,419.84 × 587
  4. Step 4: Simplify right side
    1,028.96x = 833,446.08
  5. Step 5: Solve for x
    x = 833,446.08/1,028.96
  6. Step 6: Final answer
    x = 809.99

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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.