Home / 815,160.32-1,221,016.80-515,486.24

Finding the Fourth Proportional to 815,160.32, 1,221,016.80 and 515,486.24

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Solution

The fourth proportional to 815,160.32, 1,221,016.80 and 515,486.24 is: 772,139.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,160.32 : 1,221,016.80 = 515,486.24 : x
  2. Step 2: Convert to fraction form
    815,160.32/1,221,016.80 = 515,486.24/x
  3. Step 3: Cross multiply
    815,160.32x = 1,221,016.80 × 515,486.24
  4. Step 4: Simplify right side
    815,160.32x = 629,417,359,208.83
  5. Step 5: Solve for x
    x = 629,417,359,208.83/815,160.32
  6. Step 6: Final answer
    x = 772,139.35

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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.