Home / 1,290,256.27-1,780,452.79-717,261.55

Finding the Fourth Proportional to 1,290,256.27, 1,780,452.79 and 717,261.55

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Solution

The fourth proportional to 1,290,256.27, 1,780,452.79 and 717,261.55 is: 989,764.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,256.27 : 1,780,452.79 = 717,261.55 : x
  2. Step 2: Convert to fraction form
    1,290,256.27/1,780,452.79 = 717,261.55/x
  3. Step 3: Cross multiply
    1,290,256.27x = 1,780,452.79 × 717,261.55
  4. Step 4: Simplify right side
    1,290,256.27x = 1,277,050,327,857.22
  5. Step 5: Solve for x
    x = 1,277,050,327,857.22/1,290,256.27
  6. Step 6: Final answer
    x = 989,764.87

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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.