Home / 1,327,695.40-1,991,312.70-485,813.80

Finding the Fourth Proportional to 1,327,695.40, 1,991,312.70 and 485,813.80

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Solution

The fourth proportional to 1,327,695.40, 1,991,312.70 and 485,813.80 is: 728,636.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327,695.40 : 1,991,312.70 = 485,813.80 : x
  2. Step 2: Convert to fraction form
    1,327,695.40/1,991,312.70 = 485,813.80/x
  3. Step 3: Cross multiply
    1,327,695.40x = 1,991,312.70 × 485,813.80
  4. Step 4: Simplify right side
    1,327,695.40x = 967,407,189,775.26
  5. Step 5: Solve for x
    x = 967,407,189,775.26/1,327,695.40
  6. Step 6: Final answer
    x = 728,636.39

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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.