Home / 1,478.21-2,217.32-382.49

Finding the Fourth Proportional to 1,478.21, 2,217.32 and 382.49

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Solution

The fourth proportional to 1,478.21, 2,217.32 and 382.49 is: 573.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.21 : 2,217.32 = 382.49 : x
  2. Step 2: Convert to fraction form
    1,478.21/2,217.32 = 382.49/x
  3. Step 3: Cross multiply
    1,478.21x = 2,217.32 × 382.49
  4. Step 4: Simplify right side
    1,478.21x = 848,089.73
  5. Step 5: Solve for x
    x = 848,089.73/1,478.21
  6. Step 6: Final answer
    x = 573.73

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Double scale
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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.