Home / 1,290,287.30-1,780,709.91-709,612.74

Finding the Fourth Proportional to 1,290,287.30, 1,780,709.91 and 709,612.74

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Solution

The fourth proportional to 1,290,287.30, 1,780,709.91 and 709,612.74 is: 979,327.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,287.30 : 1,780,709.91 = 709,612.74 : x
  2. Step 2: Convert to fraction form
    1,290,287.30/1,780,709.91 = 709,612.74/x
  3. Step 3: Cross multiply
    1,290,287.30x = 1,780,709.91 × 709,612.74
  4. Step 4: Simplify right side
    1,290,287.30x = 1,263,614,436,208.73
  5. Step 5: Solve for x
    x = 1,263,614,436,208.73/1,290,287.30
  6. Step 6: Final answer
    x = 979,327.97

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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.