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Finding the Fourth Proportional to 1,027.61, 1,418.16 and 608.21

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Solution

The fourth proportional to 1,027.61, 1,418.16 and 608.21 is: 839.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.61 : 1,418.16 = 608.21 : x
  2. Step 2: Convert to fraction form
    1,027.61/1,418.16 = 608.21/x
  3. Step 3: Cross multiply
    1,027.61x = 1,418.16 × 608.21
  4. Step 4: Simplify right side
    1,027.61x = 862,539.09
  5. Step 5: Solve for x
    x = 862,539.09/1,027.61
  6. Step 6: Final answer
    x = 839.36

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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.