Home / 1,290,273.52-1,780,476.60-717,278.80

Finding the Fourth Proportional to 1,290,273.52, 1,780,476.60 and 717,278.80

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Solution

The fourth proportional to 1,290,273.52, 1,780,476.60 and 717,278.80 is: 989,788.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,273.52 : 1,780,476.60 = 717,278.80 : x
  2. Step 2: Convert to fraction form
    1,290,273.52/1,780,476.60 = 717,278.80/x
  3. Step 3: Cross multiply
    1,290,273.52x = 1,780,476.60 × 717,278.80
  4. Step 4: Simplify right side
    1,290,273.52x = 1,277,098,119,076.08
  5. Step 5: Solve for x
    x = 1,277,098,119,076.08/1,290,273.52
  6. Step 6: Final answer
    x = 989,788.68

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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.