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Finding the Fourth Proportional to 3,605.76, 4,978.36 and 3,357.72

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Solution

The fourth proportional to 3,605.76, 4,978.36 and 3,357.72 is: 4,635.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,605.76 : 4,978.36 = 3,357.72 : x
  2. Step 2: Convert to fraction form
    3,605.76/4,978.36 = 3,357.72/x
  3. Step 3: Cross multiply
    3,605.76x = 4,978.36 × 3,357.72
  4. Step 4: Simplify right side
    3,605.76x = 16,715,938.94
  5. Step 5: Solve for x
    x = 16,715,938.94/3,605.76
  6. Step 6: Final answer
    x = 4,635.90

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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.