Home / 1,290,402.36-1,780,704.54-717,400.80

Finding the Fourth Proportional to 1,290,402.36, 1,780,704.54 and 717,400.80

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Solution

The fourth proportional to 1,290,402.36, 1,780,704.54 and 717,400.80 is: 989,984.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,402.36 : 1,780,704.54 = 717,400.80 : x
  2. Step 2: Convert to fraction form
    1,290,402.36/1,780,704.54 = 717,400.80/x
  3. Step 3: Cross multiply
    1,290,402.36x = 1,780,704.54 × 717,400.80
  4. Step 4: Simplify right side
    1,290,402.36x = 1,277,478,861,559.63
  5. Step 5: Solve for x
    x = 1,277,478,861,559.63/1,290,402.36
  6. Step 6: Final answer
    x = 989,984.91

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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.