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Finding the Fourth Proportional to 3,869.66, 5,804.37 and 947.90

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Solution

The fourth proportional to 3,869.66, 5,804.37 and 947.90 is: 1,421.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.66 : 5,804.37 = 947.90 : x
  2. Step 2: Convert to fraction form
    3,869.66/5,804.37 = 947.90/x
  3. Step 3: Cross multiply
    3,869.66x = 5,804.37 × 947.90
  4. Step 4: Simplify right side
    3,869.66x = 5,501,933.30
  5. Step 5: Solve for x
    x = 5,501,933.30/3,869.66
  6. Step 6: Final answer
    x = 1,421.81

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1.5x scale

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.