Home / 1,025.58-1,538.37-478.15

Finding the Fourth Proportional to 1,025.58, 1,538.37 and 478.15

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Solution

The fourth proportional to 1,025.58, 1,538.37 and 478.15 is: 717.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.58 : 1,538.37 = 478.15 : x
  2. Step 2: Convert to fraction form
    1,025.58/1,538.37 = 478.15/x
  3. Step 3: Cross multiply
    1,025.58x = 1,538.37 × 478.15
  4. Step 4: Simplify right side
    1,025.58x = 735,563.92
  5. Step 5: Solve for x
    x = 735,563.92/1,025.58
  6. Step 6: Final answer
    x = 717.22

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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.