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Finding the Fourth Proportional to 440,138.40, 659,624.40 and 389,983.20

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Solution

The fourth proportional to 440,138.40, 659,624.40 and 389,983.20 is: 584,458.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,138.40 : 659,624.40 = 389,983.20 : x
  2. Step 2: Convert to fraction form
    440,138.40/659,624.40 = 389,983.20/x
  3. Step 3: Cross multiply
    440,138.40x = 659,624.40 × 389,983.20
  4. Step 4: Simplify right side
    440,138.40x = 257,242,434,310.08
  5. Step 5: Solve for x
    x = 257,242,434,310.08/440,138.40
  6. Step 6: Final answer
    x = 584,458.06

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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.