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Finding the Fourth Proportional to 978,074.20, 1,467,038.40 and 409,308.40

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Solution

The fourth proportional to 978,074.20, 1,467,038.40 and 409,308.40 is: 613,932.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,074.20 : 1,467,038.40 = 409,308.40 : x
  2. Step 2: Convert to fraction form
    978,074.20/1,467,038.40 = 409,308.40/x
  3. Step 3: Cross multiply
    978,074.20x = 1,467,038.40 × 409,308.40
  4. Step 4: Simplify right side
    978,074.20x = 600,471,140,242.56
  5. Step 5: Solve for x
    x = 600,471,140,242.56/978,074.20
  6. Step 6: Final answer
    x = 613,932.09

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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.