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Finding the Fourth Proportional to 5,405.64, 7,459.80 and 3,047.78

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Solution

The fourth proportional to 5,405.64, 7,459.80 and 3,047.78 is: 4,205.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,405.64 : 7,459.80 = 3,047.78 : x
  2. Step 2: Convert to fraction form
    5,405.64/7,459.80 = 3,047.78/x
  3. Step 3: Cross multiply
    5,405.64x = 7,459.80 × 3,047.78
  4. Step 4: Simplify right side
    5,405.64x = 22,735,829.24
  5. Step 5: Solve for x
    x = 22,735,829.24/5,405.64
  6. Step 6: Final answer
    x = 4,205.95

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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.