Home / 815,032.80-1,220,216.40-721,720.80

Finding the Fourth Proportional to 815,032.80, 1,220,216.40 and 721,720.80

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Solution

The fourth proportional to 815,032.80, 1,220,216.40 and 721,720.80 is: 1,080,515.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,032.80 : 1,220,216.40 = 721,720.80 : x
  2. Step 2: Convert to fraction form
    815,032.80/1,220,216.40 = 721,720.80/x
  3. Step 3: Cross multiply
    815,032.80x = 1,220,216.40 × 721,720.80
  4. Step 4: Simplify right side
    815,032.80x = 880,655,556,381.12
  5. Step 5: Solve for x
    x = 880,655,556,381.12/815,032.80
  6. Step 6: Final answer
    x = 1,080,515.48

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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.