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Finding the Fourth Proportional to 5,655.35, 7,800.49 and 3,980.27

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Solution

The fourth proportional to 5,655.35, 7,800.49 and 3,980.27 is: 5,490.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,655.35 : 7,800.49 = 3,980.27 : x
  2. Step 2: Convert to fraction form
    5,655.35/7,800.49 = 3,980.27/x
  3. Step 3: Cross multiply
    5,655.35x = 7,800.49 × 3,980.27
  4. Step 4: Simplify right side
    5,655.35x = 31,048,056.33
  5. Step 5: Solve for x
    x = 31,048,056.33/5,655.35
  6. Step 6: Final answer
    x = 5,490.03

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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.