Home / 1,311,091,789.72-1,809,252,830.60-716,396,689.28

Finding the Fourth Proportional to 1,311,091,789.72, 1,809,252,830.60 and 716,396,689.28

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Solution

The fourth proportional to 1,311,091,789.72, 1,809,252,830.60 and 716,396,689.28 is: 988,598,012.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311,091,789.72 : 1,809,252,830.60 = 716,396,689.28 : x
  2. Step 2: Convert to fraction form
    1,311,091,789.72/1,809,252,830.60 = 716,396,689.28/x
  3. Step 3: Cross multiply
    1,311,091,789.72x = 1,809,252,830.60 × 716,396,689.28
  4. Step 4: Simplify right side
    1,311,091,789.72x = 1,296,142,737,912,308,480
  5. Step 5: Solve for x
    x = 1,296,142,737,912,308,480/1,311,091,789.72
  6. Step 6: Final answer
    x = 988,598,012.80

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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.