Home / 1,290,255.54-1,780,613.40-717,305.28

Finding the Fourth Proportional to 1,290,255.54, 1,780,613.40 and 717,305.28

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Solution

The fourth proportional to 1,290,255.54, 1,780,613.40 and 717,305.28 is: 989,915.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,255.54 : 1,780,613.40 = 717,305.28 : x
  2. Step 2: Convert to fraction form
    1,290,255.54/1,780,613.40 = 717,305.28/x
  3. Step 3: Cross multiply
    1,290,255.54x = 1,780,613.40 × 717,305.28
  4. Step 4: Simplify right side
    1,290,255.54x = 1,277,243,393,458.75
  5. Step 5: Solve for x
    x = 1,277,243,393,458.75/1,290,255.54
  6. Step 6: Final answer
    x = 989,915.06

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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.