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Finding the Fourth Proportional to 603,695.20, 906,579.60 and 427,439.20

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Solution

The fourth proportional to 603,695.20, 906,579.60 and 427,439.20 is: 641,892.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,695.20 : 906,579.60 = 427,439.20 : x
  2. Step 2: Convert to fraction form
    603,695.20/906,579.60 = 427,439.20/x
  3. Step 3: Cross multiply
    603,695.20x = 906,579.60 × 427,439.20
  4. Step 4: Simplify right side
    603,695.20x = 387,507,658,960.32
  5. Step 5: Solve for x
    x = 387,507,658,960.32/603,695.20
  6. Step 6: Final answer
    x = 641,892.89

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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.