Home / 1,287,200.55-1,930,800.83-340,666.95

Finding the Fourth Proportional to 1,287,200.55, 1,930,800.83 and 340,666.95

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Solution

The fourth proportional to 1,287,200.55, 1,930,800.83 and 340,666.95 is: 511,000.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,200.55 : 1,930,800.83 = 340,666.95 : x
  2. Step 2: Convert to fraction form
    1,287,200.55/1,930,800.83 = 340,666.95/x
  3. Step 3: Cross multiply
    1,287,200.55x = 1,930,800.83 × 340,666.95
  4. Step 4: Simplify right side
    1,287,200.55x = 657,760,028,110.23
  5. Step 5: Solve for x
    x = 657,760,028,110.23/1,287,200.55
  6. Step 6: Final answer
    x = 511,000.43

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Double scale
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Similar ratio
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1.5x scale

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.