Home / 1,290,281.52-1,780,487.64-717,286.80

Finding the Fourth Proportional to 1,290,281.52, 1,780,487.64 and 717,286.80

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Solution

The fourth proportional to 1,290,281.52, 1,780,487.64 and 717,286.80 is: 989,799.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,281.52 : 1,780,487.64 = 717,286.80 : x
  2. Step 2: Convert to fraction form
    1,290,281.52/1,780,487.64 = 717,286.80/x
  3. Step 3: Cross multiply
    1,290,281.52x = 1,780,487.64 × 717,286.80
  4. Step 4: Simplify right side
    1,290,281.52x = 1,277,120,281,735.15
  5. Step 5: Solve for x
    x = 1,277,120,281,735.15/1,290,281.52
  6. Step 6: Final answer
    x = 989,799.72

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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.