Home / 1,088.25-1,632.69-318.75

Finding the Fourth Proportional to 1,088.25, 1,632.69 and 318.75

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Solution

The fourth proportional to 1,088.25, 1,632.69 and 318.75 is: 478.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.25 : 1,632.69 = 318.75 : x
  2. Step 2: Convert to fraction form
    1,088.25/1,632.69 = 318.75/x
  3. Step 3: Cross multiply
    1,088.25x = 1,632.69 × 318.75
  4. Step 4: Simplify right side
    1,088.25x = 520,419.94
  5. Step 5: Solve for x
    x = 520,419.94/1,088.25
  6. Step 6: Final answer
    x = 478.22

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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.