Home / 659,619.20-989,817.60-435,627.20

Finding the Fourth Proportional to 659,619.20, 989,817.60 and 435,627.20

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Solution

The fourth proportional to 659,619.20, 989,817.60 and 435,627.20 is: 653,697.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,619.20 : 989,817.60 = 435,627.20 : x
  2. Step 2: Convert to fraction form
    659,619.20/989,817.60 = 435,627.20/x
  3. Step 3: Cross multiply
    659,619.20x = 989,817.60 × 435,627.20
  4. Step 4: Simplify right side
    659,619.20x = 431,191,469,598.72
  5. Step 5: Solve for x
    x = 431,191,469,598.72/659,619.20
  6. Step 6: Final answer
    x = 653,697.57

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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.