Home / 1,485.38-2,227.89-511.40

Finding the Fourth Proportional to 1,485.38, 2,227.89 and 511.40

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Solution

The fourth proportional to 1,485.38, 2,227.89 and 511.40 is: 767.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.38 : 2,227.89 = 511.40 : x
  2. Step 2: Convert to fraction form
    1,485.38/2,227.89 = 511.40/x
  3. Step 3: Cross multiply
    1,485.38x = 2,227.89 × 511.40
  4. Step 4: Simplify right side
    1,485.38x = 1,139,342.95
  5. Step 5: Solve for x
    x = 1,139,342.95/1,485.38
  6. Step 6: Final answer
    x = 767.04

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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.