Home / 1,391,503,665.70-1,920,160,912.17-819,195,878.26

Finding the Fourth Proportional to 1,391,503,665.70, 1,920,160,912.17 and 819,195,878.26

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Solution

The fourth proportional to 1,391,503,665.70, 1,920,160,912.17 and 819,195,878.26 is: 1,130,423,112.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,503,665.70 : 1,920,160,912.17 = 819,195,878.26 : x
  2. Step 2: Convert to fraction form
    1,391,503,665.70/1,920,160,912.17 = 819,195,878.26/x
  3. Step 3: Cross multiply
    1,391,503,665.70x = 1,920,160,912.17 × 819,195,878.26
  4. Step 4: Simplify right side
    1,391,503,665.70x = 1,572,987,904,845,625,856
  5. Step 5: Solve for x
    x = 1,572,987,904,845,625,856/1,391,503,665.70
  6. Step 6: Final answer
    x = 1,130,423,112.51

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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.