Home / 1,290,215.76-1,780,558.52-717,265.50

Finding the Fourth Proportional to 1,290,215.76, 1,780,558.52 and 717,265.50

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Solution

The fourth proportional to 1,290,215.76, 1,780,558.52 and 717,265.50 is: 989,860.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,215.76 : 1,780,558.52 = 717,265.50 : x
  2. Step 2: Convert to fraction form
    1,290,215.76/1,780,558.52 = 717,265.50/x
  3. Step 3: Cross multiply
    1,290,215.76x = 1,780,558.52 × 717,265.50
  4. Step 4: Simplify right side
    1,290,215.76x = 1,277,133,193,540.73
  5. Step 5: Solve for x
    x = 1,277,133,193,540.73/1,290,215.76
  6. Step 6: Final answer
    x = 989,860.17

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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.