Home / 385,622.40-578,433.60-259,651.20

Finding the Fourth Proportional to 385,622.40, 578,433.60 and 259,651.20

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Solution

The fourth proportional to 385,622.40, 578,433.60 and 259,651.20 is: 389,476.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,622.40 : 578,433.60 = 259,651.20 : x
  2. Step 2: Convert to fraction form
    385,622.40/578,433.60 = 259,651.20/x
  3. Step 3: Cross multiply
    385,622.40x = 578,433.60 × 259,651.20
  4. Step 4: Simplify right side
    385,622.40x = 150,190,978,360.32
  5. Step 5: Solve for x
    x = 150,190,978,360.32/385,622.40
  6. Step 6: Final answer
    x = 389,476.80

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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.