Home / 811,880.38-1,120,430.09-449,304.36

Finding the Fourth Proportional to 811,880.38, 1,120,430.09 and 449,304.36

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Solution

The fourth proportional to 811,880.38, 1,120,430.09 and 449,304.36 is: 620,059.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,880.38 : 1,120,430.09 = 449,304.36 : x
  2. Step 2: Convert to fraction form
    811,880.38/1,120,430.09 = 449,304.36/x
  3. Step 3: Cross multiply
    811,880.38x = 1,120,430.09 × 449,304.36
  4. Step 4: Simplify right side
    811,880.38x = 503,414,125,635.45
  5. Step 5: Solve for x
    x = 503,414,125,635.45/811,880.38
  6. Step 6: Final answer
    x = 620,059.48

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Double scale
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1.5x scale

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.