Home / 1,398,444,101.67-1,929,853,049.21-771,912,647.85

Finding the Fourth Proportional to 1,398,444,101.67, 1,929,853,049.21 and 771,912,647.85

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Solution

The fourth proportional to 1,398,444,101.67, 1,929,853,049.21 and 771,912,647.85 is: 1,065,239,558.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,444,101.67 : 1,929,853,049.21 = 771,912,647.85 : x
  2. Step 2: Convert to fraction form
    1,398,444,101.67/1,929,853,049.21 = 771,912,647.85/x
  3. Step 3: Cross multiply
    1,398,444,101.67x = 1,929,853,049.21 × 771,912,647.85
  4. Step 4: Simplify right side
    1,398,444,101.67x = 1,489,677,977,177,087,488
  5. Step 5: Solve for x
    x = 1,489,677,977,177,087,488/1,398,444,101.67
  6. Step 6: Final answer
    x = 1,065,239,558.30

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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.