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Finding the Fourth Proportional to 440,192.40, 659,705.40 and 390,037.20

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Solution

The fourth proportional to 440,192.40, 659,705.40 and 390,037.20 is: 584,539.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,192.40 : 659,705.40 = 390,037.20 : x
  2. Step 2: Convert to fraction form
    440,192.40/659,705.40 = 390,037.20/x
  3. Step 3: Cross multiply
    440,192.40x = 659,705.40 × 390,037.20
  4. Step 4: Simplify right side
    440,192.40x = 257,309,647,040.88
  5. Step 5: Solve for x
    x = 257,309,647,040.88/440,192.40
  6. Step 6: Final answer
    x = 584,539.05

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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.