Home / 1,187,084,064.46-1,638,170,761.16-678,438,291.86

Finding the Fourth Proportional to 1,187,084,064.46, 1,638,170,761.16 and 678,438,291.86

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Solution

The fourth proportional to 1,187,084,064.46, 1,638,170,761.16 and 678,438,291.86 is: 936,241,843.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,084,064.46 : 1,638,170,761.16 = 678,438,291.86 : x
  2. Step 2: Convert to fraction form
    1,187,084,064.46/1,638,170,761.16 = 678,438,291.86/x
  3. Step 3: Cross multiply
    1,187,084,064.46x = 1,638,170,761.16 × 678,438,291.86
  4. Step 4: Simplify right side
    1,187,084,064.46x = 1,111,397,772,976,386,560
  5. Step 5: Solve for x
    x = 1,111,397,772,976,386,560/1,187,084,064.46
  6. Step 6: Final answer
    x = 936,241,843.56

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Double scale
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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.