Home / 1,478.13-2,217.66-438.13

Finding the Fourth Proportional to 1,478.13, 2,217.66 and 438.13

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Solution

The fourth proportional to 1,478.13, 2,217.66 and 438.13 is: 657.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.13 : 2,217.66 = 438.13 : x
  2. Step 2: Convert to fraction form
    1,478.13/2,217.66 = 438.13/x
  3. Step 3: Cross multiply
    1,478.13x = 2,217.66 × 438.13
  4. Step 4: Simplify right side
    1,478.13x = 971,623.38
  5. Step 5: Solve for x
    x = 971,623.38/1,478.13
  6. Step 6: Final answer
    x = 657.33

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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.