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Finding the Fourth Proportional to 1,213,220, 1,674,243.60 and 676,676

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Solution

The fourth proportional to 1,213,220, 1,674,243.60 and 676,676 is: 933,812.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,220 : 1,674,243.60 = 676,676 : x
  2. Step 2: Convert to fraction form
    1,213,220/1,674,243.60 = 676,676/x
  3. Step 3: Cross multiply
    1,213,220x = 1,674,243.60 × 676,676
  4. Step 4: Simplify right side
    1,213,220x = 1,132,920,462,273.60
  5. Step 5: Solve for x
    x = 1,132,920,462,273.60/1,213,220
  6. Step 6: Final answer
    x = 933,812.88

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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.