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Finding the Fourth Proportional to 937.60, 1,399.13 and 775.60

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Solution

The fourth proportional to 937.60, 1,399.13 and 775.60 is: 1,157.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.60 : 1,399.13 = 775.60 : x
  2. Step 2: Convert to fraction form
    937.60/1,399.13 = 775.60/x
  3. Step 3: Cross multiply
    937.60x = 1,399.13 × 775.60
  4. Step 4: Simplify right side
    937.60x = 1,085,165.23
  5. Step 5: Solve for x
    x = 1,085,165.23/937.60
  6. Step 6: Final answer
    x = 1,157.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.