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Finding the Fourth Proportional to 937.36, 1,288.08 and 781.84

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Solution

The fourth proportional to 937.36, 1,288.08 and 781.84 is: 1,074.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.36 : 1,288.08 = 781.84 : x
  2. Step 2: Convert to fraction form
    937.36/1,288.08 = 781.84/x
  3. Step 3: Cross multiply
    937.36x = 1,288.08 × 781.84
  4. Step 4: Simplify right side
    937.36x = 1,007,072.47
  5. Step 5: Solve for x
    x = 1,007,072.47/937.36
  6. Step 6: Final answer
    x = 1,074.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.