Home / 810,919.89-1,117,781.17-638,564.45

Finding the Fourth Proportional to 810,919.89, 1,117,781.17 and 638,564.45

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Solution

The fourth proportional to 810,919.89, 1,117,781.17 and 638,564.45 is: 880,204.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,919.89 : 1,117,781.17 = 638,564.45 : x
  2. Step 2: Convert to fraction form
    810,919.89/1,117,781.17 = 638,564.45/x
  3. Step 3: Cross multiply
    810,919.89x = 1,117,781.17 × 638,564.45
  4. Step 4: Simplify right side
    810,919.89x = 713,775,310,856.09
  5. Step 5: Solve for x
    x = 713,775,310,856.09/810,919.89
  6. Step 6: Final answer
    x = 880,204.47

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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.