Home / 1,057.12-1,585.80-326.72

Finding the Fourth Proportional to 1,057.12, 1,585.80 and 326.72

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Solution

The fourth proportional to 1,057.12, 1,585.80 and 326.72 is: 490.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.12 : 1,585.80 = 326.72 : x
  2. Step 2: Convert to fraction form
    1,057.12/1,585.80 = 326.72/x
  3. Step 3: Cross multiply
    1,057.12x = 1,585.80 × 326.72
  4. Step 4: Simplify right side
    1,057.12x = 518,112.58
  5. Step 5: Solve for x
    x = 518,112.58/1,057.12
  6. Step 6: Final answer
    x = 490.12

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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.