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Finding the Fourth Proportional to 5,321,718.40, 7,983,614.40 and 2,126,300.80

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Solution

The fourth proportional to 5,321,718.40, 7,983,614.40 and 2,126,300.80 is: 3,189,865.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321,718.40 : 7,983,614.40 = 2,126,300.80 : x
  2. Step 2: Convert to fraction form
    5,321,718.40/7,983,614.40 = 2,126,300.80/x
  3. Step 3: Cross multiply
    5,321,718.40x = 7,983,614.40 × 2,126,300.80
  4. Step 4: Simplify right side
    5,321,718.40x = 16,975,565,685,611.52
  5. Step 5: Solve for x
    x = 16,975,565,685,611.52/5,321,718.40
  6. Step 6: Final answer
    x = 3,189,865.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.