Home / 1,231,038.80-1,699,116.90-721,905.20

Finding the Fourth Proportional to 1,231,038.80, 1,699,116.90 and 721,905.20

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Solution

The fourth proportional to 1,231,038.80, 1,699,116.90 and 721,905.20 is: 996,395.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,038.80 : 1,699,116.90 = 721,905.20 : x
  2. Step 2: Convert to fraction form
    1,231,038.80/1,699,116.90 = 721,905.20/x
  3. Step 3: Cross multiply
    1,231,038.80x = 1,699,116.90 × 721,905.20
  4. Step 4: Simplify right side
    1,231,038.80x = 1,226,601,325,517.88
  5. Step 5: Solve for x
    x = 1,226,601,325,517.88/1,231,038.80
  6. Step 6: Final answer
    x = 996,395.34

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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.