Home / 1,288,009.60-1,932,014.40-815,228.80

Finding the Fourth Proportional to 1,288,009.60, 1,932,014.40 and 815,228.80

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Solution

The fourth proportional to 1,288,009.60, 1,932,014.40 and 815,228.80 is: 1,222,843.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,009.60 : 1,932,014.40 = 815,228.80 : x
  2. Step 2: Convert to fraction form
    1,288,009.60/1,932,014.40 = 815,228.80/x
  3. Step 3: Cross multiply
    1,288,009.60x = 1,932,014.40 × 815,228.80
  4. Step 4: Simplify right side
    1,288,009.60x = 1,575,033,780,894.72
  5. Step 5: Solve for x
    x = 1,575,033,780,894.72/1,288,009.60
  6. Step 6: Final answer
    x = 1,222,843.20

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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.