Home / 1,020.18-1,530.25-289.75

Finding the Fourth Proportional to 1,020.18, 1,530.25 and 289.75

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Solution

The fourth proportional to 1,020.18, 1,530.25 and 289.75 is: 434.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.18 : 1,530.25 = 289.75 : x
  2. Step 2: Convert to fraction form
    1,020.18/1,530.25 = 289.75/x
  3. Step 3: Cross multiply
    1,020.18x = 1,530.25 × 289.75
  4. Step 4: Simplify right side
    1,020.18x = 443,389.94
  5. Step 5: Solve for x
    x = 443,389.94/1,020.18
  6. Step 6: Final answer
    x = 434.62

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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.