Home / 813,638.67-1,220,010.89-646,231.11

Finding the Fourth Proportional to 813,638.67, 1,220,010.89 and 646,231.11

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Solution

The fourth proportional to 813,638.67, 1,220,010.89 and 646,231.11 is: 968,991.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,638.67 : 1,220,010.89 = 646,231.11 : x
  2. Step 2: Convert to fraction form
    813,638.67/1,220,010.89 = 646,231.11/x
  3. Step 3: Cross multiply
    813,638.67x = 1,220,010.89 × 646,231.11
  4. Step 4: Simplify right side
    813,638.67x = 788,408,988,425.63
  5. Step 5: Solve for x
    x = 788,408,988,425.63/813,638.67
  6. Step 6: Final answer
    x = 968,991.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.