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Finding the Fourth Proportional to 1,020.58, 1,408.88 and 600.80

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Solution

The fourth proportional to 1,020.58, 1,408.88 and 600.80 is: 829.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.58 : 1,408.88 = 600.80 : x
  2. Step 2: Convert to fraction form
    1,020.58/1,408.88 = 600.80/x
  3. Step 3: Cross multiply
    1,020.58x = 1,408.88 × 600.80
  4. Step 4: Simplify right side
    1,020.58x = 846,445.06
  5. Step 5: Solve for x
    x = 846,445.06/1,020.58
  6. Step 6: Final answer
    x = 829.38

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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.