Home / 1,478.12-2,217.51-438.14

Finding the Fourth Proportional to 1,478.12, 2,217.51 and 438.14

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Solution

The fourth proportional to 1,478.12, 2,217.51 and 438.14 is: 657.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.12 : 2,217.51 = 438.14 : x
  2. Step 2: Convert to fraction form
    1,478.12/2,217.51 = 438.14/x
  3. Step 3: Cross multiply
    1,478.12x = 2,217.51 × 438.14
  4. Step 4: Simplify right side
    1,478.12x = 971,579.83
  5. Step 5: Solve for x
    x = 971,579.83/1,478.12
  6. Step 6: Final answer
    x = 657.31

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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.