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Finding the Fourth Proportional to 1,017.60, 1,403.37 and 736.80

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Solution

The fourth proportional to 1,017.60, 1,403.37 and 736.80 is: 1,016.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.60 : 1,403.37 = 736.80 : x
  2. Step 2: Convert to fraction form
    1,017.60/1,403.37 = 736.80/x
  3. Step 3: Cross multiply
    1,017.60x = 1,403.37 × 736.80
  4. Step 4: Simplify right side
    1,017.60x = 1,034,003.02
  5. Step 5: Solve for x
    x = 1,034,003.02/1,017.60
  6. Step 6: Final answer
    x = 1,016.12

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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.