Home / 1,391,663.34-1,920,316.14-818,494.38

Finding the Fourth Proportional to 1,391,663.34, 1,920,316.14 and 818,494.38

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Solution

The fourth proportional to 1,391,663.34, 1,920,316.14 and 818,494.38 is: 1,129,416.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,663.34 : 1,920,316.14 = 818,494.38 : x
  2. Step 2: Convert to fraction form
    1,391,663.34/1,920,316.14 = 818,494.38/x
  3. Step 3: Cross multiply
    1,391,663.34x = 1,920,316.14 × 818,494.38
  4. Step 4: Simplify right side
    1,391,663.34x = 1,571,767,968,413.29
  5. Step 5: Solve for x
    x = 1,571,767,968,413.29/1,391,663.34
  6. Step 6: Final answer
    x = 1,129,416.81

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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.