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Finding the Fourth Proportional to 440,135.40, 659,619.90 and 389,980.20

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Solution

The fourth proportional to 440,135.40, 659,619.90 and 389,980.20 is: 584,453.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,135.40 : 659,619.90 = 389,980.20 : x
  2. Step 2: Convert to fraction form
    440,135.40/659,619.90 = 389,980.20/x
  3. Step 3: Cross multiply
    440,135.40x = 659,619.90 × 389,980.20
  4. Step 4: Simplify right side
    440,135.40x = 257,238,700,525.98
  5. Step 5: Solve for x
    x = 257,238,700,525.98/440,135.40
  6. Step 6: Final answer
    x = 584,453.56

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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.