Home / 485,418.38-669,865.95-281,505.74

Finding the Fourth Proportional to 485,418.38, 669,865.95 and 281,505.74

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Solution

The fourth proportional to 485,418.38, 669,865.95 and 281,505.74 is: 388,471.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,418.38 : 669,865.95 = 281,505.74 : x
  2. Step 2: Convert to fraction form
    485,418.38/669,865.95 = 281,505.74/x
  3. Step 3: Cross multiply
    485,418.38x = 669,865.95 × 281,505.74
  4. Step 4: Simplify right side
    485,418.38x = 188,571,109,955.55
  5. Step 5: Solve for x
    x = 188,571,109,955.55/485,418.38
  6. Step 6: Final answer
    x = 388,471.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.