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Finding the Fourth Proportional to 669,475.60, 1,003,896.60 and 389,078.80

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Solution

The fourth proportional to 669,475.60, 1,003,896.60 and 389,078.80 is: 583,434.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,475.60 : 1,003,896.60 = 389,078.80 : x
  2. Step 2: Convert to fraction form
    669,475.60/1,003,896.60 = 389,078.80/x
  3. Step 3: Cross multiply
    669,475.60x = 1,003,896.60 × 389,078.80
  4. Step 4: Simplify right side
    669,475.60x = 390,594,884,452.08
  5. Step 5: Solve for x
    x = 390,594,884,452.08/669,475.60
  6. Step 6: Final answer
    x = 583,434.09

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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.