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Finding the Fourth Proportional to 1,028.49, 1,419.40 and 586.41

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Solution

The fourth proportional to 1,028.49, 1,419.40 and 586.41 is: 809.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.49 : 1,419.40 = 586.41 : x
  2. Step 2: Convert to fraction form
    1,028.49/1,419.40 = 586.41/x
  3. Step 3: Cross multiply
    1,028.49x = 1,419.40 × 586.41
  4. Step 4: Simplify right side
    1,028.49x = 832,341.14
  5. Step 5: Solve for x
    x = 832,341.14/1,028.49
  6. Step 6: Final answer
    x = 809.28

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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.