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Finding the Fourth Proportional to 937.76, 1,406.79 and 450.80

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Solution

The fourth proportional to 937.76, 1,406.79 and 450.80 is: 676.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.76 : 1,406.79 = 450.80 : x
  2. Step 2: Convert to fraction form
    937.76/1,406.79 = 450.80/x
  3. Step 3: Cross multiply
    937.76x = 1,406.79 × 450.80
  4. Step 4: Simplify right side
    937.76x = 634,173.90
  5. Step 5: Solve for x
    x = 634,173.90/937.76
  6. Step 6: Final answer
    x = 676.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.