Home / 1,290,301.52-1,780,515.12-717,306.80

Finding the Fourth Proportional to 1,290,301.52, 1,780,515.12 and 717,306.80

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Solution

The fourth proportional to 1,290,301.52, 1,780,515.12 and 717,306.80 is: 989,827.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,301.52 : 1,780,515.12 = 717,306.80 : x
  2. Step 2: Convert to fraction form
    1,290,301.52/1,780,515.12 = 717,306.80/x
  3. Step 3: Cross multiply
    1,290,301.52x = 1,780,515.12 × 717,306.80
  4. Step 4: Simplify right side
    1,290,301.52x = 1,277,175,603,078.82
  5. Step 5: Solve for x
    x = 1,277,175,603,078.82/1,290,301.52
  6. Step 6: Final answer
    x = 989,827.25

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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.