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Finding the Fourth Proportional to 7,302.94, 10,078.05 and 3,990.94

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Solution

The fourth proportional to 7,302.94, 10,078.05 and 3,990.94 is: 5,507.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,302.94 : 10,078.05 = 3,990.94 : x
  2. Step 2: Convert to fraction form
    7,302.94/10,078.05 = 3,990.94/x
  3. Step 3: Cross multiply
    7,302.94x = 10,078.05 × 3,990.94
  4. Step 4: Simplify right side
    7,302.94x = 40,220,892.87
  5. Step 5: Solve for x
    x = 40,220,892.87/7,302.94
  6. Step 6: Final answer
    x = 5,507.49

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1.5x scale

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.