Home / 1,478.10-2,217.22-438.06

Finding the Fourth Proportional to 1,478.10, 2,217.22 and 438.06

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Solution

The fourth proportional to 1,478.10, 2,217.22 and 438.06 is: 657.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.10 : 2,217.22 = 438.06 : x
  2. Step 2: Convert to fraction form
    1,478.10/2,217.22 = 438.06/x
  3. Step 3: Cross multiply
    1,478.10x = 2,217.22 × 438.06
  4. Step 4: Simplify right side
    1,478.10x = 971,275.39
  5. Step 5: Solve for x
    x = 971,275.39/1,478.10
  6. Step 6: Final answer
    x = 657.11

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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.